Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ae456f44620c1c…

MALICIOUS

PDF

49.6 KB Created: 2021-01-11 23:54:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: b7a112340d7a56ea381b79603002a507 SHA-1: 362179bfd98884b96d2a36728513a75a23f95a28 SHA-256: 94ae456f44620c1cd46cd463944623cc0c5c1b6be58387612c748e8e41cbe975
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing a link to a known malicious redirector. Heuristics indicate it is a link farm on disposable hosting, and ML classifiers and ClamAV also flagged it as malicious. The embedded URL likely serves as a lure to redirect users to a phishing site or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6502

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://gettraff.ru/aws?utm_term=guidelines+treatment+of+pneumonia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4389606/normal_5fa00e04daef1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481406/normal_5fdf325f93ed8.pdfIn PDF document text
    • https://site-1177793.mozfiles.com/files/1177793/buratakefilogerijox.pdfIn PDF document text
    • https://site-1168352.mozfiles.com/files/1168352/ultraflo_butterfly_valves.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450037/normal_5fb2b4b896f88.pdfIn PDF document text
    • https://site-1178803.mozfiles.com/files/1178803/sutaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405206/normal_5f9238071cb33.pdfIn PDF document text
    • https://site-1176004.mozfiles.com/files/1176004/internet_speed_meter_pro_apk_2018.pdfIn PDF document text
    • https://site-1175981.mozfiles.com/files/1175981/university_of_hong_kong_business_school_ranking.pdfIn PDF document text
    • https://s3.amazonaws.com/jepinebawo/57576035120.pdfIn PDF document text
    • https://s3.amazonaws.com/petubapizo/how_to_live_in_a_5th_wheel_full_time.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/g_switch_3_unblocked_66_games.pdfIn PDF document text

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