Malicious PDF — malware analysis report

Static analysis result for SHA-256 050055f057a635f3…

MALICIOUS

PDF

50.6 KB Created: 2021-03-25 04:21:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d68bba2f7fe69d8320b5002b9f02c7a1 SHA-1: 77c237badbbf885cad3e956a0b4011bc0074aad9 SHA-256: 050055f057a635f340a4049cb2e7c80259a57d8dbfc7e5ca671ce3190caf5788
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file identified as malicious by ClamAV and a machine learning classifier. Heuristics indicate it's an image-only PDF designed as a lure, containing clickable external URIs. The document body is heavily obfuscated, but the presence of embedded URLs and the overall structure strongly suggest a phishing attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9372

Heuristics 5

  • 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 50 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://maypoin.ru/aws?utm_term=how+powerful+the+mind+is+quotes
    • https://litezami.weebly.com/uploads/1/3/4/5/134514091/58f3223d7e9f35.pdf
    • https://cdn-cms.f-static.net/uploads/4496148/normal_6018be7a6bfe0.pdf
    • http://storeplus.pro/73920093729widy0.pdf
    • https://demaxezobenila.weebly.com/uploads/1/3/1/8/131856353/kubupelosis.pdf
    • https://venunuwaxel.weebly.com/uploads/1/3/2/7/132740799/rupexetuvarevoso.pdf
    • https://cdn-cms.f-static.net/uploads/4420907/normal_60286d21b1891.pdf
    • https://koralazuvumo.weebly.com/uploads/1/3/1/8/131871516/6771710.pdf
    • https://kizofupotumi.weebly.com/uploads/1/3/4/3/134314367/6e8db.pdf
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/muvasi_lokozonivaned_pifipurekatod.pdf
    • https://buliduxefexefux.weebly.com/uploads/1/3/1/6/131636978/904f39c03ae9a.pdf
    • http://silkhfig.bid/189537132715lg1l.pdf
    • https://static.s123-cdn-static.com/uploads/4498392/normal_5fe2bafa367f1.pdf
    • https://s3.amazonaws.com/wozowuledij/pabufedakiwupu.pdf
    • https://uploads.strikinglycdn.com/files/2a27cb4f-5792-4450-af97-8aae3f3065a5/fejutivufimilopi.pdf
    • https://uploads.strikinglycdn.com/files/c9b2b0ad-1dc6-4f0b-a1dd-609720c73df0/how_much_do_registered_nurses_get_paid_in_zambia.pdf
    • https://s3.amazonaws.com/muxozuvalubi/34176439960.pdf
    • https://s3.amazonaws.com/nefomojuwet/robbery_bob_2_mod_apk_unlimited_coins.pdf
    • https://uploads.strikinglycdn.com/files/a0755dbc-0e32-4280-a6ec-ac183874f060/64915183253.pdf
    • https://s3.amazonaws.com/nufidibodudulad/nino_rota_godfather_sheet_music.pdf
    • https://uploads.strikinglycdn.com/files/d0609c72-4a99-4059-9459-4a692be5dd88/zunizo.pdf
    • https://uploads.strikinglycdn.com/files/246d7e41-96d0-4498-9b62-5401ee810a98/foxabetokukoviwib.pdf