Malicious PDF — malware analysis report

Static analysis result for SHA-256 377847bcb5e44cfe…

MALICIOUS

PDF

52.9 KB Created: 2021-06-01 14:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 53f63b59aeda37f5377a9201a2b0e1f4 SHA-1: 345d6ccc9965ec5806e5583d720ea444c6bc7c6a SHA-256: 377847bcb5e44cfe8e6bbcc87f8fee5db06a5c8655e2f884936b90367d37afb9
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, designed to trick users into clicking external links. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of embedded URLs, suggesting a campaign to distribute malicious content or phish for credentials. While no scripts were explicitly extracted, the presence of external links and the ML classification strongly suggest malicious intent, likely involving the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7480

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 52 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://oniceh.ru/pbw?utm_term=l%2527all%25C3%25A9gorie+de+la+caverne+texte+int%25C3%25A9gral+pdf
    • https://cdn-cms.f-static.net/uploads/4446915/normal_6028b293c0bac.pdf
    • https://fidevawane.weebly.com/uploads/1/3/0/8/130814252/dopulagif.pdf
    • https://vozexipazaxa.weebly.com/uploads/1/3/4/4/134444785/patapigudidatirokulu.pdf
    • https://rebopugosoge.weebly.com/uploads/1/3/5/3/135346619/4c6076d.pdf
    • https://juputifewusa.weebly.com/uploads/1/3/4/4/134435955/875732.pdf
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    • https://musisemikalig.weebly.com/uploads/1/3/4/6/134694348/wowaxegukikeputire.pdf
    • https://pilewamef.weebly.com/uploads/1/3/4/8/134849526/92286b1692fd.pdf
    • https://static.s123-cdn-static.com/uploads/4387701/normal_5fcfe4bef3b05.pdf
    • https://mefinijusigoti.weebly.com/uploads/1/3/4/4/134499215/0a47c74db0c.pdf
    • http://moxulolo.pbworks.com/f/ninne_chudanu_pommantu_kannulu_musi_kurchunna_mp3_songs_download_telugu.pdf
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    • https://uploads.strikinglycdn.com/files/334ff83a-c613-4d00-b465-ba619040ccb3/2004_chevy_malibu_lt_reviews.pdf
    • https://uploads.strikinglycdn.com/files/887c650a-443d-4a22-80cb-2609dcb5d616/butewapenonojolurikox.pdf
    • https://uploads.strikinglycdn.com/files/092d0c3b-31f3-4828-8dbd-f98f49e74deb/doxalaxoludiwod.pdf
    • https://uploads.strikinglycdn.com/files/1de0009a-4a65-4098-bee3-ab36164be309/where_is_scroll_lock_on_logitech_keyboard.pdf
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    • https://uploads.strikinglycdn.com/files/56cd02cd-551b-4e5f-85f2-5c6d7ded45ae/85501407128.pdf
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    • https://uploads.strikinglycdn.com/files/758b1705-736a-4684-9579-089e269602ac/the_secret_garden_restaurant_placencia_belize.pdf