Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ff810ccc7e06092…

MALICIOUS

PDF

81.4 KB Created: 2021-04-04 16:48:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 10a7170345e77cb21a249fb9ff1973bb SHA-1: b0d7e8f6ec2577f5eef6507fa1ed1d324eee4c76 SHA-256: 9ff810ccc7e06092008e2fc32b6ac0f56ceb3e35293dca53354bcdfe517de756
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size, image-heavy content, and embedded clickable link. The heuristic 'PDF_IMAGE_LURE' indicates a common tactic where a screenshot is used to hide an action trigger. The presence of numerous external URIs, many hosted on disposable domains, further supports a phishing or malicious redirection scenario. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7564

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-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 81 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://jacksth.ru/123?utm_term=context+clues+definition+and+restatement+worksheet+answers
    • https://cdn-cms.f-static.net/uploads/4484990/normal_6042d8a4a6361.pdf
    • http://nanamojuvimujo.medianewsonline.com/broken_glass_arthur_miller.pdf
    • https://cdn-cms.f-static.net/uploads/4407733/normal_605198689f9d4.pdf
    • http://tryadasert.online/400778110714scza.pdf
    • http://rte-ita.fun/crown_xti_4000_specificationsrfoa7.pdf
    • http://stassikorskyi.com/61045347544y0nf5.pdf
    • https://cdn.sqhk.co/liripudeb/jdiggfS/complete_math_smart_7.pdf
    • http://feretefet.22web.org/najemomane.pdf
    • http://tvoyoproc.fun/37148059233rsuk9.pdf
    • https://cdn.sqhk.co/laruxibut/jhhdij7/vezoweb.pdf
    • http://fabikaj.iblogger.org/after_effects_shape_animation_presets_free.pdf
    • https://cdn-cms.f-static.net/uploads/4373776/normal_5fd7d9af81b3c.pdf
    • http://dovudegumigisaw.rf.gd/kilupivedexivetel.pdf

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