Malicious PDF — malware analysis report

Static analysis result for SHA-256 17e3988588c0f845…

MALICIOUS

PDF

46.1 KB Created: 2021-06-08 16:34:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: e73a3f2a70e3b4adad2b95eff3872e44 SHA-1: 1a50547f76d3f7da9df05126fb333d129687bbc6 SHA-256: 17e3988588c0f84519c8699a6d7494bd8aa756811e7d9f92a3d83454b21fd759
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 0.9864

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 https://netcdn.tw/app/431946152/roblox-robux-hack-v1-34-download-game-hack PDF link annotation
    • http://opac.kolejkrim.edu.my/repository/download-hacked-games-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-spins-daily-1-ga_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-god-hacks_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-hack-all-the-games-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-downloads-for-coin-master-daily-rewards_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-roblox-net-one-handynummer_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/daily-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/114-hacks_GM479516143.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robux-best_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/pubg-uc-key_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050a2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A2 28612 bytes
SHA-256: 4fafaf74d1c79473075e209f6c7c4186692989d08244be88527634fae9cc9023
font_01_sfnt_off00008e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E73 19304 bytes
SHA-256: f097f56797918616bfa3c05d564a596a818c12a661a58786a9a98dab2d33f8ff

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