Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8fa9ea6f95d7a57…

MALICIOUS

PDF

41.6 KB Created: 2021-03-30 03:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd935fb8ce2fafbdc7fe06b1b152a5b9 SHA-1: 3cb9260ba9bcfda0363df3057c3b687b36f45c86 SHA-256: f8fa9ea6f95d7a57cc266a5271162144cb23b29249d95b7753081c25417e4fc1
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, and it employs a common phishing tactic by presenting itself as an image-based lure. It contains multiple external URLs, with https://gimoguvi.ru/aws?utm_term=xerox+workcentre+7855i+toner+cartridges being a prominent one that likely leads to a malicious site. The document's structure and the presence of numerous disposable links suggest a phishing campaign aimed at users searching for specific products.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7936

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 41 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://gimoguvi.ru/aws?utm_term=xerox+workcentre+7855i+toner+cartridges
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    • http://itawegan.fun/what_is_terri_irwins_net_worthl8h9l.pdf
    • http://nenonazuf.scienceontheweb.net/beregadufujuwazedu.pdf
    • http://budofibo.mygamesonline.org/tatuvawi.pdf
    • http://about-central.com/75313527200lulb7.pdf
    • http://wepijafiguwenan.mywebcommunity.org/ejercicios_resueltos_arboles_de_decision.pdf
    • http://wide-do.top/cfa_level_1_mock_exam_2018_downloadhjagr.pdf
    • https://cdn.sqhk.co/muwizavo/ngigheb/54064536106.pdf
    • https://s3.amazonaws.com/tesasubawalozan/wozem.pdf
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    • http://bojepudadadax.atwebpages.com/sosyal_bilgiler_6._snf_1._nite_test.pdf
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_73086d7bba3945e8b47d7fc4586a2d3b.pdf?index=true
    • http://lofunadex.myartsonline.com/learn_python_the_hard_way_4th_edition_download.pdf
    • https://s3.amazonaws.com/somamere/xisaguxoramebumoworux.pdf
    • https://ca7c05ed-d233-4774-9cf9-08ff86aa6c73.filesusr.com/ugd/b42fd6_57fadf68bf2b4434b02fbd937a468e80.pdf?index=true
    • https://d21da297-2d1c-4020-882f-059d99c29dc9.filesusr.com/ugd/3724a2_1452d765943a465dacdc516fa7146d6e.pdf?index=true
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_82d22ee863314ac4b7f0af08ce257d3d.pdf?index=true
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_57fbb37387cf4e3ebaf4f365dc2e00ba.pdf?index=true

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