Malicious PDF — malware analysis report

Static analysis result for SHA-256 04fabf4dc68443e6…

MALICIOUS

PDF

82.7 KB Created: 2021-08-31 20:51:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6461ded1a36ea5670fa171ebe5959816 SHA-1: 12b75d25483351b9cb6659447f1f4cb034fea093 SHA-256: 04fabf4dc68443e6b93d1a228118dabf37798dd2921c42eb16555c779976af0d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to potentially compromised WordPress sites and disposable hosting, likely to lure users into downloading further malware. The presence of external URIs and link farm heuristics strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • 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 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.
  • 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://zge-led.com/luodan/images/userfiles/file/9994462898.pdf In PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5b2ef8f813---wasoke.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160afa4bec18ad---binez.pdfIn PDF document text
    • https://absoluteanytime.com/media_file/files/files/felitorodamigadoponog.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/lefagilujo.pdfIn PDF document text
    • https://juhaszautovill.hu/userfiles/file/telimesujibuwibidi.pdfIn PDF document text
    • http://hbaoge.com/upload/files/77159985280.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608f7dceb25a9---76347756535.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b89dc300dc---favaded.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/b88210f36db10c02c9d6e25833873115/tabawuwulur.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/47576308507.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/14531546241.pdfIn PDF document text
    • https://namratalakhotia.com/userfiles/files/86625087978.pdfIn PDF document text
    • http://15881588.com/ckupload/files/laribobavukigeta.pdfIn PDF document text
    • http://wdnederland.nl/file/nonika.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/29492890268.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b731be78709---sejuvip.pdfIn PDF document text
    • https://threadworx.com/thread/admin/uploads/file/72062263562.pdfIn PDF document text
    • http://nepodoshlo.kz/ckfinder/userfiles/files/mowukesufenakofo.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b25ea0a0086---46837452979.pdfIn PDF document text
    • https://bamor.org/userfiles/file/69144364996.pdfIn PDF document text
    • http://holdemigny.fr/ckfinder/userfiles/files/nepelorikuzodudi.pdfIn PDF document text
    • https://ddtoyz.com/ckfinder/userfiles/files/82586763163.pdfIn PDF document text
    • http://unseenadventure.com/userfiles/file/mizorawejusugivosoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=best+ps2+emulator+for+android+2020PDF 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_off0000dbdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBDD 11052 bytes
SHA-256: b920a3200463c4761d41328b792633c9fdf91d49ad3f4ad75a629ea6b3d4faa2
font_01_sfnt_off0000f5a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A0 18064 bytes
SHA-256: 4691fd417eee23b90b99c141abe325c0136b71957a8dac32af6c591141a4fce6
font_02_sfnt_off0001247b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1247B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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