Malicious PDF — malware analysis report

Static analysis result for SHA-256 488fc4f17f733bcf…

MALICIOUS

PDF

49.8 KB Created: 2021-03-22 01:19:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: c8d948f5dde0b2ea7a87e980e6caa8f3 SHA-1: 897024686165a6bf2d908e991f5f56ebe1816bae SHA-256: 488fc4f17f733bcfb2a3d2684bbacf4590f7b9e4734ac1c1801506eaf9a29224
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to create a link farm for SEO manipulation or to host malicious content. The ML classifier and ClamAV detection further confirm the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7086

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/award?keyword=curso+para+aprender+a+dibujar+pdf PDF link annotation
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    • http://lnstagram-verificationbadgeform.com/tv_tropes_fairly_oddparentsmcfj1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492245/normal_5fe7747adfa29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464077/normal_6008b18984df4.pdfIn PDF document text
    • http://subejewumo.scienceontheweb.net/vocabulary_for_ielts_speaking_academic.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386829/normal_5fdb5cc483d00.pdfIn PDF document text
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    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/vozabumakuteg.pdfIn PDF document text
    • http://japarof.mywebcommunity.org/how_to_get_ready_to_run_a_half_marathon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4a3e3846-1b3f-497a-a942-5f8ae72b52f5/85195933756.pdfIn PDF document text
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    • https://uploads.strikinglycdn.com/files/75f268e5-ff0a-4570-b44e-0324a7752443/24531505221.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d10cc9-c3d4-4d6b-bac8-6171dd555115/what_is_the_blue_book_value_of_a_2011_ford_escape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/559fd325-f18a-4be5-bf36-6a7f4365c35c/ring_keypad_blinking_green_battery_light.pdfIn PDF document text
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