Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9f49d68d08a83d7…

MALICIOUS

PDF

50.3 KB Created: 2021-06-07 12:14:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9f4536ce5b1b450e3ccb7f71ae476843 SHA-1: 650103fd6d3d0da9b0636446ed9115537721b21d SHA-256: f9f49d68d08a83d7eeb83716f4e08ceb1308bbb228f518d8baf63deb9824044a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a lure related to game hacks, specifically Roblox, directing users to a URL that likely hosts further malicious content. The ML classifier strongly flagged this PDF as malicious, and multiple heuristics indicate a redirection to a game hack generator. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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-how-to-hack-any-accoynt-game-hack PDF link annotation
    • http://mycookingpot.com/images/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/free-robux-app_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/is-minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/minecraft-hacks-xbox_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/roblox-free-2021-robux_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/wurst-112-2_GM479516143.pdfIn PDF document text
    • http://mycookingpot.com/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/coin-master-game-hack-apk_GM406889139.pdfIn PDF document text
    • http://mycookingpot.com/images/free-roblox_GM431946152.pdfIn PDF document text
    • http://mycookingpot.com/images/freespinandcoinblogspotcom-2021-11-coinmasterfreespinandcoinlinkshtml_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000054b8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54B8 28448 bytes
SHA-256: 1c6af0563fe882f90d3fb917bd4585572f2aa33a222d8205861718cccad60415
font_01_sfnt_off00009668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9668 2960 bytes
SHA-256: 0a120e61bf7fb492cbe4ca5c834836f4e5cf498413e52a640fb1e1ca4cf66a73
font_02_sfnt_off0000a0a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA0A2 18628 bytes
SHA-256: 13e22b47bd1d8ce65380468e1997b22707cc7d22e6b311fb441f0543e7ceaed0

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