Malicious PDF — malware analysis report

Static analysis result for SHA-256 1779ed4bef9d335f…

MALICIOUS

PDF

50.6 KB Created: 2020-11-18 01:49:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 680e489ee3d16a3bbfd7e0eb385b184b SHA-1: 61a95fa2f20e204715fd0834debcffa3d76c3b08 SHA-256: 1779ed4bef9d335fffd8512214c2b3f0a62c078500f785f954e21aa02658e596
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a large number of external links, many hosted on disposable domains, suggesting an attempt to redirect users to malicious websites. The document body is heavily obfuscated, but the presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6064

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-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 50 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://traffine.ru/aws?utm_term=sprinkler+irrigation+system+design+calculations+pdf
    • https://kelabuwak.weebly.com/uploads/1/3/4/0/134098394/kenemut.pdf
    • https://woxejisuwu.weebly.com/uploads/1/3/4/3/134322210/fizaz.pdf
    • https://bajumavo.weebly.com/uploads/1/3/4/4/134486103/ruzurib.pdf
    • https://sekulawovow.weebly.com/uploads/1/3/4/5/134578441/493898.pdf
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/xaloberodujone.pdf
    • https://natizupasa.weebly.com/uploads/1/3/1/4/131437725/7719048.pdf
    • https://jijutuvexezepor.weebly.com/uploads/1/3/4/4/134444828/1929082.pdf
    • https://feriwixuwegixuf.weebly.com/uploads/1/3/4/6/134602873/mutawoduweto.pdf
    • https://mabanopovofed.weebly.com/uploads/1/3/1/4/131453130/punisapuf-pebaxafixarimen-mijoxubox-xaxuji.pdf
    • https://wirufaxiferid.weebly.com/uploads/1/3/4/5/134599318/1757039.pdf
    • https://fufivivol.weebly.com/uploads/1/3/0/8/130873849/724488.pdf

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