Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2206afd1fcf4925…

MALICIOUS

PDF

84.2 KB Created: 2021-09-01 01:52:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 338283a77fb0ee29c1f61e3c19868870 SHA-1: 34e2ef353d1b42f778f7c36d9b29135491fe95fe SHA-256: c2206afd1fcf4925ad2a414be1e955de4355e5f2faf1fb78c17576a62cc23875
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, specifically identified as a phishing trojan by ClamAV. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other disposable hosting, likely intended to lead users to malicious content or phishing pages. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the presence of many unknown URLs strongly suggests a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/05329268fb6f3f5294c18940615a7d82/92941185714.pdf In PDF document text
    • https://snqrsl.quebec/upload/editor/file/giramukelezojasaf.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/8c5c124241290fc5036d47ba3e5c6b40/78479362023.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/6af160ee54b5704cb12b13d95da3acb8/52088570718.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/lipexarag.pdfIn PDF document text
    • https://www.willmarareachamber.com/ckfinder/userfiles/files/93530410332.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160f3cb7b0cba5---50799808285.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/8978751024.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/93896389196.pdfIn PDF document text
    • http://hasici-pristroje-eshop.cz/files/file/muribukusonasezodak.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721306203fe---31278749739.pdfIn PDF document text
    • http://generoussecurity.com/uploads/72285308514.pdfIn PDF document text
    • https://www.lashharmony.co.uk/wp-content/plugins/super-forms/uploads/php/files/sr6ftlaojm9ggf152c7pg33ous/62075072350.pdfIn PDF document text
    • http://lindseyderence.com/userfiles/files/xumasolowokuzudojevuxifu.pdfIn PDF document text
    • https://virker-ikke.dk/files/49989415956.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210628222554116.pdfIn PDF document text
    • http://findmealocalpainter.com/insurazon/admin/userfiles/file/kebos.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075057fe0a34---32309038738.pdfIn PDF document text
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/23541717668.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/penupi.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ba04ae310---fejezebusoluzuvunafixebaj.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608291d56f1cc---20991204533.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=the+analogical+imaginationPDF 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_off0000e578.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE578 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD8F 10372 bytes
SHA-256: 4bb9b9c9130a122dcfb98cad2a5cd5418dd7d52ec6df00769106557517e13216
font_02_sfnt_off000114c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C9 17860 bytes
SHA-256: 493c0f23b501ab5c12157f4c5e2335763d3d141f42822fa9915a1fed405e7f08

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