Malicious PDF — malware analysis report

Static analysis result for SHA-256 a615a895d33ee118…

MALICIOUS

PDF

84.6 KB Created: 2021-06-09 21:37:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 69392e80797899980f32a79be787b619 SHA-1: 01ef1f5faef5e8a7bc7ca6c6cb07a7887f89fa6a SHA-256: a615a895d33ee1181865a6d88c5fb80409a166320a8c335f96f34bee83aa1780
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting sites. The presence of 'utm_term=iframe+src+pdf+base64' in one URL suggests an attempt to disguise or obfuscate the true nature of the linked content, likely for phishing or malware delivery. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7220

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://smidgel.ru/uplcv?utm_term=iframe+src+pdf+base64 PDF link annotation
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/u2ku7lqdacoo4skh8ro8pu2lt6/37691100458.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/211ecf41a50d4e758e2df80a61734f81/67683232772.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/dbb436fc88facffea9431da73bf4f4f0/zidirimufanejomod.pdfIn PDF document text
    • http://jngf.cn/files/file/92869874661.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/41d10naqupdar2u03aq9pgatej/mojufopasetavo.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/96588836131.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/56p097oll1en0em7622qk3fv5f/75633828775.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607801f7d82dd---87220933136.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/ed422e67850c3501a16b3810536073c1/vegisat.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/86d3cd213bcccd26a12bea772d823846/44149426761.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/39970946354.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085fb20a1dae---41008158278.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/9v5r9v31urhujjsua9rff45gra/43346901469.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609974a38fd5b---9541609068.pdfIn PDF document text
    • http://cityhelps.org/clients/6/61/61afa7a028a8e04f14432b0fece6f2b0/File/30524787810.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/89890898869.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/vezofutajuvekovuvo.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af752aacb7a---65528050997.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/1399f106ea7dea9e740085cc1b88e70b/52049980651.pdfIn PDF document text

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