Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e5a669cb4c729df…

MALICIOUS

PDF

50.0 KB Created: 2021-01-19 23:41:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8b3c54b8c450a9493c5e74856d28dc73 SHA-1: ec4d1ee213749b66e5311830c5fd1ba5a76cf447 SHA-256: 0e5a669cb4c729df9bb2982948791d22a71ab9bf5582856fad198987f9f477f7
242 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links, many pointing to disposable hosting, and one critical link to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a game mod, suggesting a lure to entice users to click on malicious links. The presence of PDF-specific heuristics for malicious redirectors and link farms strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7327

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://ggtraff.ru/wb?keyword=heroes.%20io%20multiplayer%20battle%20royale%20arena%20mod%20apk In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f8e2f929847d.pdfIn PDF document text
    • https://cdn.sqhk.co/fofesali/9JpF1xT/teddi_mellencamp_age.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/WUpZzCY/virtual_canva_social_media_icons.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410988/normal_60055c72678d5.pdfIn PDF document text
    • https://cdn.sqhk.co/manowipete/dNecjhZ/kikkerland_rainbow_maker_canada.pdfIn PDF document text
    • https://gusemotasejodab.weebly.com/uploads/1/3/2/7/132741535/nejan.pdfIn PDF document text
    • https://cdn.sqhk.co/pazakazagoz/7QRzz61/bugogetigenoluz.pdfIn PDF document text
    • https://kipunazumalimak.weebly.com/uploads/1/3/4/7/134755782/9215869.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/6iHxTDd/75462229775.pdfIn PDF document text
    • https://foluxafan.weebly.com/uploads/1/3/5/3/135397430/931680.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489054/normal_5fb452576d23a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459029/normal_5fefdec1867c9.pdfIn PDF document text
    • http://wekameti.rf.gd/how_to_become_tour_guide_in_europe.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/printable_reading_comprehension_worksheets_for_3rd_grade.pdfIn PDF document text
    • http://tosodesuvivat.epizy.com/antifungal_drugs_mechanism_of_action.pdfIn PDF document text

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