Malicious PDF — malware analysis report

Static analysis result for SHA-256 04c5adc4480840c0…

MALICIOUS

PDF

42.1 KB Created: 2021-04-05 03:26:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dceec42bd90fb9235f430dfa11d518c9 SHA-1: 1bdc13c8ec185198c999414e9e82205207349943 SHA-256: 04c5adc4480840c06f8aa1e783848334fa739d6720f6196da773063ad27ccaba
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8161

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 42 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/award?keyword=auxin+journal+pdf PDF link annotation
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    • http://grafoanaliz.ru/ginenulivopofituziwezidugjwcb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_601f0508f02c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476140/normal_601d8c75274db.pdfIn PDF document text
    • http://itash.space/automatic_car_wash_business_plannc7b5.pdfIn PDF document text
    • https://vonepegoparopew.weebly.com/uploads/1/3/4/3/134352316/rikatajakepil_sawivapaxija_wupulexusife.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408593/normal_60018ec7db149.pdfIn PDF document text
    • http://natusab.22web.org/memokijopufojise.pdfIn PDF document text
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    • https://xesofizagib.weebly.com/uploads/1/3/4/4/134491847/6747049.pdfIn PDF document text
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    • http://kaxegukepoxar.rf.gd/capacitive_voltage_transformer_in_substation.pdfIn PDF document text
    • http://wiwawilif.epizy.com/sig_sauer_p938_leather_paddle_holster.pdfIn PDF document text
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    • https://s3.amazonaws.com/wewuxuviwar/lupejilulal.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/manual_ft-897d_portugus.pdfIn PDF document text