Malicious PDF — malware analysis report

Static analysis result for SHA-256 3541ed59638d6ced…

MALICIOUS

PDF

80.2 KB Created: 2021-05-08 01:17:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 200a4b13da1df669a89980b5b55916fb SHA-1: 6c8c6c42956e2229472ff4bfcee85d0114006bf3 SHA-256: 3541ed59638d6ced995d9669ae394337de146d1e68151978a8b47739a4168be7
154 Risk Score

Malware Insights

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

The PDF contains a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to manipulate search results or distribute further malicious content. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, specifically identified as a phishing trojan. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with phishing and SEO poisoning tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8317

Heuristics 5

  • 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
  • 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://metabolit-plus.ru/files/file/37169500063.pdf
    • http://matstravel.ru/userfiles/file/rosebafuwubav.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f252aaf4bf---75839948036.pdf
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/4c938bfd1350cb3380bf5a12e112eba5/75054075003.pdf
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16091a2b15769c---86356321427.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/i3laaesck4cc1i6sbg8umaeir5/72215412464.pdf
    • http://say-international.eu/userfiles/file/44698024035.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608d55b7e0bdc---68207880682.pdf
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4242a2d4e---8944114690.pdf
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb30e7c374---2239663946.pdf
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab5bbc5af0---woganodojekuzufuze.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/m4jnjo3kqa6t5p3nc9dlahdv4p/nagogejubaxuvejuno.pdf
    • http://kondicionery-vidnoe.ru/upload_picture/file/lawutejakaj.pdf
    • http://beiks.info/public/file/ruvogur.pdf
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/e53fe2e9feb0b53eaf2a526561d4f580/52122980752.pdf
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd21d6bd9f---lagazal.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=2011+bmw+x3+xdrive28i+manual
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010eba.bin
39f51d9e0ace1e4fe93e716e9526a064b79bafbc16c9d4a3d92624555fd39e97		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBA 5740 bytes

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