Malicious PDF — malware analysis report

Static analysis result for SHA-256 583c1c370fb21a31…

MALICIOUS

PDF

37.3 KB Created: 2021-09-27 02:44:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-04
MD5: 441b2bbbbb93fb1795e1fe6aa9f20ebf SHA-1: e61763b40a927c8d26172fd80aeb4fc1f00ed5d2 SHA-256: 583c1c370fb21a3168d8b5a7dd3d3a2e9e424e2b6c1848313c02646469a50ed8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. It contains an image-only interface with a clickable link disguised as a download prompt, directing users to a suspicious URL. The presence of multiple embedded URLs suggests a campaign focused on redirecting users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6667

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://wastran.ru/uplcv?utm_term=pokego%2B%2B+ios+download+2020 PDF link annotation
    • http://doks-films.com/pcms/content/file/rajefadazitoxeluxeninij.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/44710221552.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/suvunewo.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/gudafojinemevaputuzeti.pdfIn PDF document text
    • https://sandipkumardutta.com/ckfinder/userfiles/files/84003616233.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/f76e2d67a353bc690df57debbb816e36/dugarexejirov.pdfIn PDF document text
    • https://driftwoodcc.com/userfiles/files/36108016173.pdfIn PDF document text
    • http://marine-inox.com/i/File/6934053779.pdfIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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