Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c903d375620b59…

MALICIOUS

PDF

49.6 KB Created: 2021-01-26 19:20:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d19322bbaa1d0ad40c9fb3ad0f51467 SHA-1: d91c954d486174c7789de05908042c94c027745f SHA-256: c9c903d375620b596bf5151544572eea958816c26bb93fd9a356c45219af1f88
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, typical of phishing campaigns, containing a clickable link to an external URL. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7360

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 49 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://leonvi.ru/aws?utm_term=arroyo+landform+definition
    • https://cdn.sqhk.co/zarifabidit/G1hjbha/kinemaster_video_editor_video_maker.pdf
    • http://damomemisogadex.iblogger.org/79788204478.pdf
    • http://befemuvejizu.22web.org/promotion_announcement_email_template.pdf
    • http://tumerasiwabuzip.22web.org/amrita_pritam_songs.pdf
    • https://cdn.sqhk.co/jagavibejabe/gejjKgc/truck_simulator_offroad_mod_apk.pdf
    • https://bapajoronugenig.weebly.com/uploads/1/3/4/2/134234589/2277423.pdf
    • https://cdn-cms.f-static.net/uploads/4451565/normal_5fe991c1e5e06.pdf
    • https://cdn.sqhk.co/ruzaxube/I4gf7zL/alphazero_vs_stockfish_all_games_pgn.pdf
    • https://static.s123-cdn-static.com/uploads/4374373/normal_5fc6936da1e1d.pdf
    • https://cdn.sqhk.co/rawerusiwala/jdxjb4T/zoom_virtual_background_disco_ball.pdf
    • https://static.s123-cdn-static.com/uploads/4467912/normal_5fe46e5adf10f.pdf
    • https://s3.amazonaws.com/tenunud/19436298837.pdf
    • https://s3.amazonaws.com/baxunaf/material_progress_bar_android_github.pdf
    • http://putazosaw.epizy.com/bikini_body_guide_1._0_free.pdf
    • https://s3.amazonaws.com/domegagowevag/83857186892.pdf
    • https://s3.amazonaws.com/kewakuko/xorusigixel.pdf
    • http://sujosivetobifir.epizy.com/knowing_brother_izone_eng_sub.pdf
    • http://bajipodi.epizy.com/23351569531.pdf

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