Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff1446d36cf8c733…

MALICIOUS

PDF

94.8 KB Created: 2021-07-17 01:45:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: cde5044a1e0fe00e75069e371beb53cb SHA-1: cf35ddf1ad2326b6654b98dfc86aff61802648b5 SHA-256: ff1446d36cf8c733dbde84aa7caf52acd5faafea2a1f71800ce531fba0f6c433
232 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links pointing to compromised WordPress sites, suggesting an attempt to host malicious content or facilitate phishing. The presence of a link farm on disposable hosting and the use of algorithmically generated URLs further indicate malicious intent, likely for distributing malware or conducting phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 10

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad4635cf3e---96312259204.pdf In PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd5b0b675a---57283986352.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/d1ldtcntesk0soei3cmcmje506/26316575243.pdfIn PDF document text
    • https://malabarmail.com/ckfinder/userfiles/files/13440208580.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/6ac5f31d7b8467636eb979f16de4144e/39122457274.pdfIn PDF document text
    • http://casaatlantida.com/userfiles/file///50956118508.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/adaf5f54646e75ca649d7043ed17b9e0/31541978266.pdfIn PDF document text
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/644bb75c89bbf6a2ba9213b949e1078d/87333413428.pdfIn PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/tawufebed.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/8b54d62e07502e9bb46780da04a309ea/tijese.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080271e9fc24---pazupesojulumodazomaku.pdfIn PDF document text
    • http://gptools.net/userfiles/file/94432013455.pdfIn PDF document text
    • http://sutinlawkrabi.com/ckfinder/userfiles/files/zonojizexovokevixopofuxam.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/salumuxegavawe.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/46913720681.pdfIn PDF document text
    • http://rivebistro.net/ckfinder/userfiles/files/daguvokolabo.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/78brfqdmuna593p8815ian9ub0/87727394869.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c80a9e719---vewukudesojugobunewub.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/kakabubibur.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/kapufizadedemev.pdfIn PDF document text
    • http://bensonlandscape.com/editorData/file/vadobilu.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/zazebazadowati.pdfIn PDF document text
    • http://synerfreight.com/syner_upload/images/files/nexapafa.pdfIn PDF document text
    • https://fizjolech.pl/userfiles/file/76752737890.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a40c2968da---wewigodo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=gross+misconduct+terminationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11240 16664 bytes
SHA-256: 3aa4ba4ed9321ba4ab783d5b125a4e20f65236eb662bd92b0ff53837ea3b5cdf
font_01_sfnt_off00013d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15571 10624 bytes
SHA-256: 54c49106126731d27cfb62dce5e9b6893b7129d0391c190cff5c3b8f98b8d8c5

Open this report in the interactive analyzer, or submit your own file for analysis.