Malicious PDF — malware analysis report

Static analysis result for SHA-256 abe53af7506ce019…

MALICIOUS

PDF

51.5 KB Created: 2021-06-12 11:38:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a04d35cb04a86c1079d894b5f67fe4bc SHA-1: 45e81edecec50cdf8ceac01bd8ecf9f8f9d12f9a SHA-256: abe53af7506ce0199647c0abf2f2e0bd3c161ad0aebe0013b864dbdef8b6e7ad
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. One prominent URL, 'https://inwebjor.ru/pbw?utm_term=advanced+systemcare+10+key+lifetime', appears to be a lure for software license keys, a common phishing tactic.

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
  • 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.
  • 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://inwebjor.ru/pbw?utm_term=advanced+systemcare+10+key+lifetime PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416144/normal_5ffe084fce9f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_6052205674f55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_60b8a8ab8c62f.pdfIn PDF document text
    • https://tiketutowiko.weebly.com/uploads/1/3/5/3/135345961/remuvodulojemox_kenopirofifimud_rimuz_kapexeka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391047/normal_605866eadd797.pdfIn PDF document text
    • https://pajedurozibije.weebly.com/uploads/1/3/4/4/134446399/sugixop_gakoxosovil_witub.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455399/normal_6033b531cd3bf.pdfIn PDF document text
    • https://puzagejezazi.weebly.com/uploads/1/3/4/4/134465952/7524060.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421770/normal_5fd8dd57845b4.pdfIn PDF document text
    • https://zajoxewamabovi.weebly.com/uploads/1/3/7/5/137503144/363027.pdfIn PDF document text
    • https://rajaxamakato.weebly.com/uploads/1/3/2/3/132302926/de17771.pdfIn PDF document text
    • https://tolubezilonis.weebly.com/uploads/1/3/5/3/135348590/3872964.pdfIn PDF document text
    • https://kegebexik.weebly.com/uploads/1/3/4/5/134590944/9b164a7905a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454990/normal_60c0404128808.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374682/normal_5fe27b63b28ec.pdfIn PDF document text
    • https://kakizizutubune.weebly.com/uploads/1/3/4/3/134351089/4507473.pdfIn PDF document text
    • https://vazatevetag.weebly.com/uploads/1/3/0/8/130874289/vuzugis_xetuwo_pifexakunoj_sutul.pdfIn PDF document text
    • https://watumuguv.weebly.com/uploads/1/3/2/6/132695830/447313.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449788/normal_604d3e7712d54.pdfIn PDF document text
    • https://sojugadetoju.weebly.com/uploads/1/3/4/6/134683069/227762.pdfIn PDF document text
    • https://gakulenem.weebly.com/uploads/1/3/1/4/131437742/6c587fda3f.pdfIn PDF document text

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