Malicious PDF — malware analysis report

Static analysis result for SHA-256 50ee1c8fb91b8862…

MALICIOUS

PDF

135.6 KB Created: 2021-01-24 03:47:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 86f6c06c14c6b910ec7b52313b43b64c SHA-1: fd565af8bcf0277b478894848fea884bca89ff9d SHA-256: 50ee1c8fb91b8862dac788479a7ec579db5020c9c70d61b5790e3d1aaf731006
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external PDFs, many hosted on disposable domains, indicating a link farm designed to distribute traffic. One critical heuristic identified a link to known malicious redirector infrastructure, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection further support the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9663

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
  • 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 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.
  • 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://traffmen.ru/aws?utm_term=busybox+android+commands+list In PDF document text
    • https://giruwaferelesed.weebly.com/uploads/1/3/4/8/134850821/8cc6dad82bfc9e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387224/normal_600a298f6f9fb.pdfIn PDF document text
    • https://zikotidule.weebly.com/uploads/1/3/4/6/134604350/lulalubinodog.pdfIn PDF document text
    • https://site-1166674.mozfiles.com/files/1166674/xowab.pdfIn PDF document text
    • https://kumapeforurimo.weebly.com/uploads/1/3/4/6/134664671/1f66e234ef.pdfIn PDF document text
    • https://site-1177662.mozfiles.com/files/1177662/crossword_puzzle_maker_super_teacher_worksheets.pdfIn PDF document text
    • https://danaguvofuboxi.weebly.com/uploads/1/3/5/4/135401293/xewuxakimitez-rosabav-robejimulika-guvem.pdfIn PDF document text
    • https://site-1256440.mozfiles.com/files/1256440/beach_buggy_racing_mod_apk_techylist.pdfIn PDF document text
    • https://site-1175584.mozfiles.com/files/1175584/giwudamomodutab.pdfIn PDF document text
    • https://domisupufiz.weebly.com/uploads/1/3/5/3/135316273/b4aa200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_5fe82840f03ea.pdfIn PDF document text
    • https://reseviris.weebly.com/uploads/1/3/5/4/135400779/90fcb7c7677.pdfIn PDF document text
    • http://mujujum.epizy.com/vofalokomaxulef.pdfIn PDF document text
    • http://navezep.epizy.com/jinewamokoto.pdfIn PDF document text
    • http://toramowajo.epizy.com/beyblade_burst_rivals_apk_android_oyun_club.pdfIn PDF document text

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