Malicious PDF — malware analysis report

Static analysis result for SHA-256 496869faebca8000…

MALICIOUS

PDF

38.7 KB Created: 2021-09-05 15:51:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: fa8fb92860303f1a9e32eafda4da778b SHA-1: 85e15fe12466ada1297c1a75b7ccde33ad387fa0 SHA-256: 496869faebca80003fc63243b4bc045db93d42b586a75d0e5d9cb4bbbeb3bd2d
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including being image-heavy with a click-outward action and containing numerous links to potentially compromised CMS upload storage. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure suggest an intent to redirect users to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8504

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://szemvidito.hu/sfwkr/feltoltesek/Images/Image/gejeti.pdf In PDF document text
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/62209e48c4d48555aa7c29e17c3f823d/xipiwuwizaza.pdfIn PDF document text
    • https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/3leuq0vipde4o007scdhb0sod2/jumalokisegovunonadivaz.pdfIn PDF document text
    • http://s2ipower.com/survey/userfiles/files/52821737000.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2df629d825---sulavamofijososagokux.pdfIn PDF document text
    • https://weilaimachinery.com/userfiles/files/48109993630.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/76653523802.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/vemabuvogirazuwizemow.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/e0b2bf7a8f8ae2872ff1818f0edbbb3e/69160765355.pdfIn PDF document text
    • http://www.dramayaramendes.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccb50918c8---5765233466.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/02lu5m0kq53sb4jftthnmisi35/58888525287.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/23895617960.pdfIn PDF document text
    • http://rokakisreunion.com/clients/a/a8/a85ca1e4cfc2bb88d767af442173b437/File/ninupi.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/19056581331.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=logistics+engineering+and+management+pdf+sixth+editionPDF link annotation

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