Malicious PDF — malware analysis report

Static analysis result for SHA-256 c94d19369a66929f…

MALICIOUS

PDF

156.6 KB Created: 2021-07-03 06:25:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 2e323e65c3094f38189b1a2e35435025 SHA-1: fd7e69f0573b1e1df5f95b3ca3cf81efef7bf540 SHA-256: c94d19369a66929f2dcfb77ad480d739eaa8fbdf823fa68321d664a150f05c3e
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed for malicious redirection. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The document body is heavily obfuscated and unreadable, providing no direct clues to its purpose beyond the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9838

Heuristics 6

  • 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.
  • 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://ats-dz.com/userfiles/file/11581820897.pdf In PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/75ij5lsmo5s8gqiucfvrbc1nmi/51345425234.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/103748280860a61e596660c.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a318096cef6---waweduzukodabogixusiji.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/46011464278.pdfIn PDF document text
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0cb5a0b789---viferanabobejenumeja.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/831ab853ec9d327651afcca541de12b7/telegolufixininewutolegu.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9c254364b8---lomekexowodilopoxatadan.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/m4nu7sj3598kh33f95lqljrl11/56002311750.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/68093994863.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/6asb8jmjoh0hctl5v2udvkrk4r/31971452431.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/ecafbb5ecc3d0eb0df18cabae17a97a5/62985782598.pdfIn PDF document text
    • http://www.marcelasemper.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091a9fec3ade---kebilatigepubegiv.pdfIn PDF document text
    • https://nutstudio.it/userfiles/file/90335373107.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074132fe47e8---24941735263.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/0645b455cf6f31e4652ce8b92ea0cb37/xatewexobukopiwexegafimaf.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/7cftv4oa60kl4pvqcn0u047mev/rojalenilu.pdfIn PDF document text
    • http://ezibra.pl/upload//file/31615440446.pdfIn PDF document text
    • http://shmountaineering.co.uk/wp-content/plugins/super-forms/uploads/php/files/q9c710ak950dcl2qq9giko4o16/duxafuluzowo.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/f1dafc6c48718e801afc6da4470c478f/74320733547.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb11c4efd92---99965941190.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813aae80251---kefij.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=chinese+martial+arts+books+pdfPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A518 33424 bytes
SHA-256: 18028b8c4e5459cbb64a986c423073f9de3cc24fc23aad74bfff8dd916f09530
font_01_sfnt_off0001ff44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FF44 11024 bytes
SHA-256: 11d2762a4ed0bd66c605bb1cf25e5f16511ff6f49bc9fb7a4fbf95ce5e04a29c
font_02_sfnt_off00021873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21873 21312 bytes
SHA-256: b4dd4e9f4ff34e7b60066e988e13a3e5f6b64d16a44113e0dbc8ff9871dc38de
font_03_sfnt_off00024c6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24C6B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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