Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c9e7d9d02a0677…

MALICIOUS

PDF

33.2 KB Created: 2021-07-20 06:27:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 39252c67e3011b713af159dc1851b50d SHA-1: b7c001cb9e1ed0ddb203d955a57dbd380247d18c SHA-256: 92c9e7d9d02a06773841ef44a2e6e9e75b23cfddf205f9e681b97c62e4587c35
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent link and call-to-action text related to 'free coins and spins' for a game, which is a common lure for phishing or malware distribution. The ML classifier strongly flagged this PDF as malicious. The embedded URLs point to domains that host similar game hack lures, suggesting a campaign distributing these types of documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/406889139/free-coins-and-spins-coin-master-game-hack PDF link annotation
    • http://forsazh-51.ru/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://forsazh-51.ru/images/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • http://forsazh-51.ru/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://forsazh-51.ru/images/minecraft-hacked-client-112-2_GM479516143.pdfIn PDF document text
    • http://forsazh-51.ru/images/free-tiktok-followers-no-survey_GM835599320.pdfIn PDF document text
    • http://forsazh-51.ru/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://forsazh-51.ru/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://forsazh-51.ru/images/free-tiktok-app_GM835599320.pdfIn PDF document text
    • http://forsazh-51.ru/images/free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://forsazh-51.ru/images/is-minecraft-free-on-xbox_GM479516143.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_002_off00002b80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2B80 23352 bytes
SHA-256: fdc22aad6e481395b89d161766161027aeb290432b90901abc1b4d92c4672d2e
font_01_sfnt_off00006078.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6078 18060 bytes
SHA-256: f1068137021f01f6b5cc3550273fdf5362b49e27ffe305b66dd7920a08d48120

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