Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65daf2926f9af59…

MALICIOUS

PDF

87.9 KB Created: 2021-09-04 05:04:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 278f2b78014052f9a9e96f083a590fdd SHA-1: ddf2696d1979d2baeca2a0a0eb51a6c27e438df6 SHA-256: a65daf2926f9af596007b93f3910eb54c70d75e40702db6af53a0e2876fa141d
174 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 contains numerous external URIs pointing to various websites, including those hosted on compromised CMS platforms and disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and the nature of the heuristics indicate the file's primary purpose is to lead users to malicious sites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7620

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://oniceh.ru/uplcv?utm_term=technique+de+stockage+des+hydrocarbures+pdf PDF link annotation
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/60581415341.pdfIn PDF document text
    • https://wronba.pl/uploads/wysiwyg/file/35103793055.pdfIn PDF document text
    • http://185.33.116.145/~acus01/upload/files/41033849196.pdfPDF link annotation
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160db994dcfed1---66409992181.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078b22ae939f---fitunesivukapuvugixag.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/adbq93isasjtgn32gqm1f13b2t/kojug.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ec424b4b80c---xinezak.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c8b93f336---54666703501.pdfIn PDF document text
    • http://salocchi.it/userfiles/files/70104998912.pdfIn PDF document text
    • http://sakem.org/userfiles/files/tijawivupetotob.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610a002119a7f---82595597872.pdfIn PDF document text
    • http://hccc252.ca/clients/e/e4/e484b38507f190a955b66748903449e1/File/23310654073.pdfIn PDF document text
    • https://feniks9.ru/ckfinder/userfiles/files/22256087208.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/napezit.pdfIn PDF document text
    • https://lasanisports.com/files/tabinabarulowa.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/83657191131.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/85946eb0b39ccd3ebe844ea3a30767f0/dowagudulobesudujeget.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607908d083ee8---fanujupe.pdfIn PDF document text
    • https://musikkursus.dk/userfiles/file/besanowojanavipepiwejuv.pdfIn PDF document text
    • http://okmarin.ru/userfiles/file/tobevuxapawatitokewano.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac9b215441---pafimepisuvesimenezubop.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/umifsqjninor6sf9gtgc4k5nrh/xumurigumeja.pdfIn PDF document text

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