Malicious PDF — malware analysis report

Static analysis result for SHA-256 77a2ce76915e7587…

MALICIOUS

PDF

31.6 KB Created: 2021-06-17 16:19:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 88d9f87fdb311fe6f56c1df6a8a3ba13 SHA-1: 4fd076e1c1e4fefcf0f82fd5e4c0321ddb4ab7de SHA-256: 77a2ce76915e758747828dedd4dc5a6be573af8109ccaea74366fe2355993c59
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 0.9824

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.co/app/431946152/free-roblox-render-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/how-to-get-free-robux-inspect_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-dbor-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-groups_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-online-hack_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/fart-attack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-roblox-gear_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-scammers-to-troll_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-promo-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-hack-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-of-2021-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/coin-master-free-spins-coins_GM406889139.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_off00002932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2932 21144 bytes
SHA-256: 214048a64ed3955fd2255b8bd10ac8b2385ae23f8e99c90c3ff6cf8ab15c64e9
font_01_sfnt_off0000573a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x573A 18824 bytes
SHA-256: d43d1865410758d528c2bfe04369d4ec510be83e4fc404c7b9347b03d54766ef

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