Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebb36c65ab6af4d3…

MALICIOUS

PDF

55.8 KB Created: 2021-03-22 07:05:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05410f8f25af161b053837ec7e1cb139 SHA-1: 0f2a4a26ab3a15718c89c7113fb3bee1c3b292e8 SHA-256: ebb36c65ab6af4d3505318ea184fca6ce7bdb1d43350335ef7e69162164331e0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by multiple heuristics, including a PDF image lure and ClamAV detection. It contains numerous external links, with one prominent link pointing to 'https://baarspo.ru/award?keyword=university+of+birmingham+campus+map+pdf', suggesting a phishing or credential harvesting attempt. The document's structure and content indicate it's designed to deceive users into clicking through to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8975

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 55 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://baarspo.ru/award?keyword=university+of+birmingham+campus+map+pdf
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/fewuk.pdf
    • https://static.s123-cdn-static.com/uploads/4366014/normal_5ff4d22402509.pdf
    • http://aires.fun/kirefuluzur6cv3w.pdf
    • https://wolazana.weebly.com/uploads/1/3/0/7/130775510/gifuturaxu.pdf
    • http://hocostyle.ru/far_cry_blood_dragon_achievement_guide9k0wq.pdf
    • http://obzorov.site/the_complete_wizards_handbookf119g.pdf
    • https://pajowivi.weebly.com/uploads/1/3/4/9/134904739/loxodikikaxodep-pesagubomijuta-buxefego-pabowa.pdf
    • https://rarejitidod.weebly.com/uploads/1/3/5/9/135993923/wubuwikes.pdf
    • https://cdn-cms.f-static.net/uploads/4462344/normal_6057ab85614ab.pdf
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/0fa100d.pdf
    • https://gazafakapudon.weebly.com/uploads/1/3/4/3/134345815/zedunapate_sijuwinoseloz_mobamedevowire_nubora.pdf
    • https://s3.amazonaws.com/sorapobuk/44964482971.pdf
    • https://s3.amazonaws.com/domegagowevag/xemodok.pdf
    • https://s3.amazonaws.com/zomuzigo/veganumexufasiza.pdf
    • https://s3.amazonaws.com/vebenok/form_submit_button_disabled_jquery.pdf
    • https://s3.amazonaws.com/lanaladu/jafabiferekimeja.pdf
    • https://s3.amazonaws.com/bokexizometun/figurative_language_and_poetic_devices_worksheet_answers.pdf

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