Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfe2148319227eca…

MALICIOUS

PDF

38.6 KB Created: 2021-09-10 09:21:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 656489e3202b053de1efe22dad8a4b8d SHA-1: af19323a0d7a0cc56ba52ef21ad9f5ccb42c226c SHA-256: dfe2148319227eca720fd15fd8ed60e66791d7def316cfd28f321d812735f8f5
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a phishing lure, likely intended to trick users into clicking external links. The document body is heavily obfuscated, but heuristics indicate it's an image-only document with action triggers, typical of phishing scams. The embedded URLs point to compromised CMS uploads and disposable hosting, further supporting the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8588

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crewmak.ru/uplcv?utm_term=pic+to+pdf+app+android PDF link annotation
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a5c28732e0---45636623865.pdfIn PDF document text
    • http://chromavials.com/d/files/luzorekaxa.pdfIn PDF document text
    • http://e-park.es/img/uploads/files/lozewisuvabo.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/43545849980.pdfIn PDF document text
    • http://xn----7sbqwxdbhblh2h.xn--p1ai/data/file/24369914511.pdfIn PDF document text
    • http://salt17.com/userfiles/files/daridinuvufobozozakowagot.pdfIn PDF document text
    • http://bilmatbasim.com/userfiles/file/55425814862.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/jodilenazumapadibire.pdfIn PDF document text
    • http://pyramidplaster.com/file_media/file_image/file/45113971486.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161363307289af---fupimorisuw.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16135db28023f2---15592360183.pdfIn PDF document text
    • https://thehouseproduction.net/file/68324236006.pdfIn PDF document text
    • http://www.dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/88615655148.pdfIn PDF document text
    • http://esteticka-stomatologie.cz/files/content/file/69809115884.pdfIn PDF document text
    • http://grandrosso.com/js/upload/files/gikilovup.pdfIn PDF document text

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