Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06c9fb15a1daf3e…

MALICIOUS

PDF

38.7 KB Created: 2021-06-24 22:44:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 18ed1fc6998aa7f662beca5b508357ab SHA-1: ab3561c60a03a72e00d91ab90989d617c762e8cc SHA-256: f06c9fb15a1daf3ea7aaf0479f896469758c1e20369b11f171924c91c8baa52b
174 Risk Score

Malware Insights

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

This PDF is designed as a phishing lure, presenting itself as an image to trick users into clicking a link. The link directs to a compromised WordPress site hosting another PDF, indicating a multi-stage attack. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a secondary payload or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7332

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://ddriu.hu/wp-content/plugins/super-forms/uploads/php/files/cf062598d87cafed779d6654b8851cb8/zejabinazewile.pdf In PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/ee805166b1b78fcc4f4d1dc72b25a318/doxilikufagagexolek.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b987f864bda---66222654857.pdfIn PDF document text
    • http://alliance-ic.ru/uploads/file/jupopuwunolukagoze.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8fe1e4881---18728332417.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/3rcu6mpb1boarmlp4rv1ag3k8b/30015103910.pdfIn PDF document text
    • http://ghalemdi.com/userfiles/file/ribivabubojuxitev.pdfIn PDF document text
    • http://indovinandoilmondo.it/themes/userfiles//files/29663089548.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/177979562.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/jsj5k8u9r7vjq2508kirlvvc72/jijofe.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/16080efcaafba6---tafesunafawikar.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/temedukuzufezuvesenijej.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160886df076540---pejezerobekanavajenisofu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=print+pdf+firefoxPDF link annotation

Related samples 8

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