Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94b59ab139a78c1…

MALICIOUS

PDF

87.4 KB Created: 2021-07-02 21:06:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 303852084dc185e9ce4240bc9b87995e SHA-1: b5db09c039ed82c58a1c87de78e321833ffe620e SHA-256: f94b59ab139a78c1259a6a007e67902039584c9b9c01ffbd098f000116bae11c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this attack pattern. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/b4aa3c9b9e1b5549031d055b072b3b3d/betebuzabekupovupudowijex.pdf In PDF document text
    • http://accu-chek-event.com/ckupload/files/ganotatupejematixak.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/db9e79ef97cc3af8387878ab721f5d14/lodon.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5f26bc0d0---vepinaga.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2d1abc2f6---54867582987.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/31992746332.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/91923053491.pdfIn PDF document text
    • https://dentalrud.com/userfiles/file/danirivinufavekagajefile.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/beremorumi.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf36698bed---xozurowaxatuvob.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a936b1f1e0---tixer.pdfIn PDF document text
    • https://rachelrom.com/rescontent/file/kibukobef.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/fodoperusopabaf.pdfIn PDF document text
    • http://www.findvoters.com/userfiles/file/ribizuwipekukoxegozilise.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f821405e4---fuzopimusagelave.pdfIn PDF document text
    • http://www.recetasyconsejos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c97b9919c---90062122465.pdfIn PDF document text
    • http://brainbond.ro/userfiles/file/62000442273.pdfIn PDF document text
    • http://ambvet-trefontane.eu/userfiles/files/luwubedazifujego.pdfIn PDF document text
    • http://stylekd.ru/files/73560458419.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/gibubajajagupukajo.pdfIn PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/77600062435.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=codes+for+star+wars+the+complete+sagaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000108fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FE 17600 bytes
SHA-256: 5ac0fb9aad9c94dadbf377311a1735f38722a5a175944cb626b6911907fd5d11
font_02_sfnt_off00013732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13732 10988 bytes
SHA-256: 2e960a143fc1f65d17a1cd763e8a7239b51bed11d826656888265c34fcb48275

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