Malicious PDF — malware analysis report

Static analysis result for SHA-256 6340b82ea42552b2…

MALICIOUS

PDF

57.2 KB Created: 2021-02-25 00:48:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c503a13d657f0dae15fa87f68c35db41 SHA-1: ebbbf6499cefe8951f2a18c6662c86e1950501b0 SHA-256: 6340b82ea42552b20942d0d8933e9cced1ee28da9de8b4b45165f291b4a7d46f
182 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple embedded links, with at least one pointing to a known malicious redirector. The heuristic firings indicate it's a malicious redirector and part of a link farm hosted on disposable infrastructure. The ML classifier also flagged it as malicious. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of malicious links strongly suggests a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6699

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/award?keyword=how+to+unlock+a+compound+miter+saw In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382194/normal_5fd27d3c3972a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423471/normal_600ee79d4ee32.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/ibTaieI/wilesu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384483/normal_5fdeed050109a.pdfIn PDF document text
    • https://cdn.sqhk.co/dofexoxev/bihgXhc/3d_flying_birds_wall_decor.pdfIn PDF document text
    • https://kajubuti.weebly.com/uploads/1/3/2/6/132680994/mubofajex-wavesox-dotuw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451549/normal_6005a1bc6a52d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444648/normal_5fcc6c730e3bb.pdfIn PDF document text
    • https://sivesasa.weebly.com/uploads/1/3/4/6/134669324/waretugexe_figapeju_mefefapo_minijixibix.pdfIn PDF document text
    • https://saxexowiki.weebly.com/uploads/1/3/0/9/130969873/6888699.pdfIn PDF document text
    • https://gasimela.weebly.com/uploads/1/3/1/3/131398285/nerulekix.pdfIn PDF document text
    • https://cdn.sqhk.co/japuwejede/Zge5Zgg/huntington_beach_mobile_home_parks.pdfIn PDF document text
    • http://wajiletum.epizy.com/lorinop.pdfIn PDF document text
    • http://tasagut.rf.gd/kofux.pdfIn PDF document text

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