Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f3e8db1a3ce645…

MALICIOUS

PDF

33.1 KB Created: 2021-07-04 20:59:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 24c9435db62f3c3c06f20d4546684baa SHA-1: 771d2239aad942a51b953b4e2b071bc33dd5cf89 SHA-256: c4f3e8db1a3ce645b4c3d116e7f1b77057bae0134656ed4648743184501786b7
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-executor-free-download-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/coin-master-villages_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-look-cool-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/pig-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-minecraft-domain_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/cuantas-hackeadas-de-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hacking-roblox-may-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-roblox-link-mad-city_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins-app-android_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-roblox-weapons_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-mad-city-hack-client_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-2021-free-robux-generator_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_off00002c9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9B 21352 bytes
SHA-256: 136009f12ac8a350e465dd4fc62e92631e912bed6dbd5b0318d76f296a79036e
font_01_sfnt_off00005b1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B1E 19400 bytes
SHA-256: 9d3cbe7a27ce38e4a819f5eac30f7d41229af3286533e465f2c08cc409e60f9a

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