Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3518622b13e919c…

MALICIOUS

PDF

58.6 KB Created: 2021-04-02 01:57:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fedad3475ecd2f26bafe365327076bd3 SHA-1: 4f3c43aed6e890623ae2bbb76fc39d9bd987ee98 SHA-256: c3518622b13e919cd8928675829d0bcd082108b09fca39b1923ff87dcd9897f0
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, presenting itself as an owner's manual but containing numerous external links. The heuristic firings indicate it functions as a link farm, likely directing users to malicious sites or further payloads. The presence of multiple disposable hosting domains and UTM parameters suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6932

Heuristics 6

  • 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.
  • 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 58 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://seumenha.ru/aws?utm_term=maytag+bravos+xl+owners+manual
    • https://galezarulunozip.weebly.com/uploads/1/3/4/8/134896955/2546255.pdf
    • https://cdn.sqhk.co/numobelez/ljjjeuE/pojufibubup.pdf
    • https://cdn.sqhk.co/pazakazagoz/7HKDOfb/33993771079.pdf
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/8ced7af3a5ba.pdf
    • https://gabusuve.weebly.com/uploads/1/3/5/2/135297202/losafuf.pdf
    • https://witabavuwimob.weebly.com/uploads/1/3/4/3/134339013/8600da0.pdf
    • http://vitebim.22web.org/ragijanisefomurus.pdf
    • http://zugawumaz.22web.org/how_to_treat_a_sick_rainbow_lorikeet.pdf
    • https://sikiroradimer.weebly.com/uploads/1/3/4/6/134619363/1931824.pdf
    • http://tekeriset.iblogger.org/7235159777.pdf
    • https://80820154-e864-4b0c-832b-212b24169927.filesusr.com/ugd/c12414_bf58929ee82342e0926a736259200dfa.pdf?index=true
    • http://lagokatu.epizy.com/jobeniwekavir.pdf
    • http://luwemazezabubat.rf.gd/85488249968.pdf
    • http://bibekuxamawijoz.epizy.com/sbi_blue_chip_fund_growth_performance.pdf
    • http://makowadoka.epizy.com/hospital_retainership_letter_template.pdf
    • http://vukelas.rf.gd/dibujarte_book_mega.pdf
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_b250633afc804688b8c269fc745c954f.pdf?index=true

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