Malicious PDF — malware analysis report

Static analysis result for SHA-256 d32d0bb7293b63fd…

MALICIOUS

PDF

82.8 KB Created: 2021-06-20 20:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7a595cbfbbbba9e897926ca323f9443e SHA-1: 5c538c001e40266bed6553ed9a95babe5f98c408 SHA-256: d32d0bb7293b63fd2dd622d2f8b5114a1f7f0e605495d15a4d4a4099b3870722
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The embedded URLs likely serve as lures for phishing attacks or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://irlanc.ru/uplcv?utm_term=brassai+paris+by+night+pdf
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160852d2f2b835---jazilixenonufe.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085867be8530---regowimupugexu.pdf
    • https://angkorphotographyguide.com/userfiles/file/92962544026.pdf
    • https://chameleoncoupons.com/adgprocessing/uploads/files/93387897932.pdf
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16089139d6297e---71565350702.pdf
    • http://ghalemdi.com/userfiles/file/24774217145.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160abf6bd7369e---romewetafoteludexotofun.pdf
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/7pf9u7p5vmjbu06nnmd3oe7ip4/90555535657.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076d344d8cbf---zokak.pdf
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/1174147b2b64e2e5f8815717a5a95623/37957145420.pdf
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/76bc9e2bc6a50745b9a5eb7101c7bd85/77236126418.pdf
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/60057547145.pdf
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/bd0e89b012ad8c401c593a3e0a83fa79/rubijinigas.pdf
    • https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/3trkkia5jb05e8v3ra729chth6/57540250886.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001038f.bin
7a6a475140fdc0a92537b925c78be9c78879f7ee3ee3f3a1b94a2e3734778788		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1038F 5564 bytes
font_01_sfnt_off00011677.bin
1de77f72d499f6e93906ada8987c9aadd15f3124b8b4d45aba9d64d98d2390ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11677 11668 bytes

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