Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e40406e177b0bf…

MALICIOUS

PDF

68.4 KB Created: 2021-06-11 19:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c88c3ce78580c35d8f5c8aa4a09f2d19 SHA-1: e7b498c455d1fb9a00190a32693c49ba0a764cc3 SHA-256: d2e40406e177b0bf37c3261150c91d7ac849fbd572bae6bf56cab0de4efcae06
154 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be compromised WordPress sites hosting PDF files. The document body, though heavily obfuscated, suggests a lure for downloading 'Ms office 2007 free download for ubuntu'. The presence of multiple external links and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9719

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 https://cructi.ru/uplcv?utm_term=ms+office+2007+free+download+for+ubuntu PDF link annotation
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/co37f19jotq8va6v6tbkiasatt/90171905316.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/25db52f4d386ab8f82885228b57be541/92480279531.pdfIn PDF document text
    • http://fygl.net/uploads/file/251305051044.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/sqpv9da1if62659grq6md27m7f/lasazen.pdfIn PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/87821272a062f4e653a239c1cc79c7e8/zomikurumumok.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a897afb9791---4527684831.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078d0db5970c---wekufofenefa.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/ff8b40d843a671a98fe441fcb6eb77cf/nebinajukiju.pdfIn PDF document text
    • https://uppersanduskyrotary.com/cms/files/File/27546546359.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/98950350416.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/54cf6e7a7c1cc6dc6a94f20ac082f1fd/zetiwoxivu.pdfIn PDF document text
    • https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/ddpgo95tsb9efkgn89qs3ccs6j/59289912573.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/letavudobuzu.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da294a8b10---35595249692.pdfIn PDF document text
    • http://www.scsi.coop/wp-content/plugins/super-forms/uploads/php/files/16a294d156d2750fc7fefc1f184cdbc4/nidelasev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBDF 5608 bytes
SHA-256: 3ec43ba250fabafcec62dbde1fb028db70e38cd625e91e8067498689f099e23f

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