Malicious PDF — malware analysis report

Static analysis result for SHA-256 74bed3cc37089969…

MALICIOUS

PDF

33.3 KB Created: 2021-07-04 22:26:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7bd842c6663b9d8a80bbaf5c51fc53de SHA-1: d88592db7d735b74a95ba6fddd836de5449ec28d SHA-256: 74bed3cc370899695b7aa45a577c3193e01c29c77d1e6468b9c80e9b2eecc1df
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/free-100-robux-game-hack PDF link annotation
    • http://katalog.gemalibrary.net/repository/pokemon-go-free-coin-promo-code_GM1094591345.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/clone-tycoon-2-roblox-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-stuff-on-roblox-ipad_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-bedrock-edition-download-pc-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/coin-master-free-spins-hack-apk-download_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/robloxheroxyz-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/hack-coin-master-apk-ios_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/cheats-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-draw-of-roblox-character_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-generator-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://katalog.gemalibrary.net/repository/free-robux-generator-no-human-verification-2021_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_off00002dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC7 21544 bytes
SHA-256: 27e524be450a934428d486767d42420863933a4e03d6ebf1a16014c97bcffb93
font_01_sfnt_off00005cea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CEA 18996 bytes
SHA-256: 50307759301c9532eb20b67e87d9cc20f2fa9f514687c8f0dcdabe953bf72270

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