Malicious PDF — malware analysis report

Static analysis result for SHA-256 37e54c0c85f61b64…

MALICIOUS

PDF

62.3 KB Created: 2021-03-18 08:27:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: fb44318af67916655601fb1fc3a8f0ef SHA-1: d091989c83442613f20115c79a63acc364cb2982 SHA-256: 37e54c0c85f61b645826c2fed81c5af1218cda8ea8ee648a00c943790ad8ef34
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or SEO spam operation. The primary URL, 'https://lozipotod.ru/award?keyword=drawing+3d+shapes+on+isometric+paper+worksheet+pdf', is presented as a search result, likely to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious intent, possibly involving the exploitation of PDF vulnerabilities or the delivery of further malicious content via the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8781

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://lozipotod.ru/award?keyword=drawing+3d+shapes+on+isometric+paper+worksheet+pdf PDF link annotation
    • https://peliretoru.weebly.com/uploads/1/3/3/9/133997281/nozun.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_6044c654cbc1a.pdfIn PDF document text
    • http://samelike.site/lokuvaluvujulunad860g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486199/normal_5fe90b3b066de.pdfIn PDF document text
    • http://nature-ital.space/kedarusazopapudexebetb48t3.pdfIn PDF document text
    • https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/mizumepiwe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_6018792317312.pdfIn PDF document text
    • http://keepsufi.space/wine_enthusiast_silent_dual_zone_10_in._18-bottle_freestanding_wine_coolerz2v8n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_6033fd9be71ae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422877/normal_5fe157b8cb28c.pdfIn PDF document text
    • https://rapusixub.weebly.com/uploads/1/3/4/6/134631860/nafavudek_mefasanavi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418968/normal_604896f7ca1f6.pdfIn PDF document text
    • http://kmikaerfs.ru/1122502951280sqg.pdfIn PDF document text
    • http://zarabatyivat.ru/goboxituwebexevatewobegod7jygq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460944/normal_6018b15088ca8.pdfIn PDF document text
    • http://getbuiss.online/47037420351vb8ef.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/2136203363.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/bevigetu.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/broiler_chicken_side_effects.pdfIn PDF document text