Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdbf228b5159d3ca…

MALICIOUS

PDF

41.5 KB Created: 2021-04-22 23:04:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-14
MD5: b8bd4ed978116f6dbc2df91e185d0f5b SHA-1: 50c3be77f22e26e4a00aba074633a76bef832782 SHA-256: cdbf228b5159d3cad7b3c97b55c3655ae1d85576c73d92402c7dd7361bfc1db4
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links and a primary URL that lure users with the promise of 'game hacks' for Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' strongly indicates this malicious intent. While no scripts were explicitly extracted, the nature of PDF links and the ML classifier's high confidence suggest a malicious workflow, likely leading to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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://netsecure.pro/app/431946152/how-to-hack-someones-account-roblox-2021-game-hack PDF link annotation
    • http://the-specials.ch/images/infinite-col-hack-sao-roblox.pdfIn PDF document text
    • http://the-specials.ch/images/how-to-gear-hack-roblox-where-you-can-destroy-things.pdfIn PDF document text
    • http://the-specials.ch/images/how-to-use-cheat-engine-63-on-roblox.pdfIn PDF document text
    • http://the-specials.ch/images/broken-bones-roblox-hack.pdfIn PDF document text
    • http://the-specials.ch/images/free-robux-that-actually-works-no-gift-card.pdfIn PDF document text
    • http://the-specials.ch/images/roblox-maniac-how-to-get-free-robux.pdfIn PDF document text
    • http://the-specials.ch/images/how-do-you-get-free-robux-on-survey.pdfIn PDF document text
    • http://the-specials.ch/images/roblox-infinite-jump-script-hack.pdfIn PDF document text
    • http://the-specials.ch/images/free-roblox-tshirts-download.pdfIn PDF document text
    • http://the-specials.ch/images/roblox-pet-simulator-free-vip-server.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
stream_003_off00004187.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4187 26708 bytes
SHA-256: 986027ec60caa77be4f58595890e59d537feb7634c74378264b86ee8347e7a89
font_01_sfnt_off00007d71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D71 19252 bytes
SHA-256: a293bb5352abb9cd0034bddd7b92dc3a661789be9a8f3755dfd0bec7d7d988e3

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