Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a7d367e32ef86cd…

MALICIOUS

PDF

108.2 KB Created: 2021-06-12 15:51:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 669a6ceeb6dd8c7aea0c8a169e06f5c1 SHA-1: 7a53d3f2b77294ece2bcd753c1ba6fb3f97d96f3 SHA-256: 2a7d367e32ef86cd6cf9cb7316e8199175f426b992f3905bebc430474b2cd6bf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites and disposable hosting, suggesting a phishing or malware distribution scheme. The document body is heavily obfuscated and contains metadata from wkhtmltopdf, but the primary malicious activity appears to be the redirection to external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9493

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://crysiq.ru/uplcv?utm_term=lost+lands+1+walkthrough PDF link annotation
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/160aa8098b1324---vutotavagazanaliw.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/dufagadisajogazakivazodul.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/12271662734.pdfIn PDF document text
    • https://cleanenergy.mn/uploads/files/19592271102.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/90958847227.pdfIn PDF document text
    • http://yossy.biz/userfiles/file/19137569355.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081bfd030003---nevukatusakufopiwewut.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/bemisiwaxabopobolosi.pdfIn PDF document text
    • http://stromzeleny.cz/file/finerozepexosigeli.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/d5168a8a97eaa14c941e3cccbbce1a87/zifedorapuxajeb.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/wiwupisenirukiz.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c03c9786af60e24bddf5f2146c92249c/2459613741.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/lhgjlh291213tj8bfmbppup457/kanomobatewazoj.pdfIn PDF document text
    • http://www.empresshasnoclothes.com/siteuploads/editorimg/file/zomazene.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/79afus0utg4fgci0jfsbub5kbh/98852643416.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1607af63712378---kadebixeve.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160ad89d7e4438---muwewuwikarav.pdfIn PDF document text

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