Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ca1482a4e9575e8…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 02:34:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 33671d4246a934f3d4decb6d98c9f103 SHA-1: ab61220c18a7e8f70804f2fb6813037bafe18305 SHA-256: 4ca1482a4e9575e8c2540e467711b4acababa4475f04761239592f6e8f72c0d8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://netcdn.tw/app/431946152/roblox-adopt-me-hacks-2021-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/roblox-project-pokemon-money-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-only-today-ad_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-eu5_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spin-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-robux-gift-card-codes_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/rom-cheat-codes-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-jailbreak-script-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-roblox-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-a2z-help_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/bloxburg-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-tower-of-hell-hack-script_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-para-conseguir-robux-gratis_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/minecraft-free-ios-2021_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-online-generator-for-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-para-roblox-de-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-esp-hack-counterblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F32 21660 bytes
SHA-256: bf1b754742e3f14a90918f1cc07e521f45cba646124dce46abb8ce3efa665554
font_01_sfnt_off00005ee5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EE5 19708 bytes
SHA-256: 3e7968c6009158f39a26a5e9beb619e98d82cfcdddd9bb58ca36d4861618e68e

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