Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b86e923f7e8fdd2…

MALICIOUS

PDF

22.0 KB Created: 2021-07-01 20:02:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 17bce83eeef8b4e5e2647e64305e9fbf SHA-1: 44dd201af983fa8f33870b2d983d35bd7a426557 SHA-256: 5b86e923f7e8fdd261fe09c7c9babe5755452ca01f2ab2f69bf314fe0969777c
212 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and Robux to entice users. It contains numerous links, including a primary redirector at http://netcdn.co/app/431946152/inquisitormaster-free-robux-game-hack, and a large number of SEO-optimized links pointing to other PDF files. The document's structure and embedded links suggest it is part of a link farm designed to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.
  • 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 http://netcdn.co/app/431946152/inquisitormaster-free-robux-game-hack In PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-in-roblox-bee-swarm-simulator-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/reddit-roblox-hacked_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-2021-sylvester_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-cool-free-avatars-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-robux-with-cheat-engine-66-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-robux-hack-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-tiktok-followers-generator_GM835599320.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-hack-youre-hacked-account-back-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-awards_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/free-robux-no-human-varucashe_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/cheat-codes-for-free-stuff-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/minecraft-multiplayer-free_GM479516143.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-free-money-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/roblox-cheat-codes-for-vehicle-simulator_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-earn-free-robux-on-blox-land_GM431946152.pdfIn PDF document text
    • http://digilibfisip.uwks.ac.id/repository/how-to-get-verified-on-tiktok-for-free_GM835599320.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003381.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3381 15661 bytes
SHA-256: 780b8e6328d0763f60231d628fb729ea998caf32b100c880cfdeba586e1bad3b

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