Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba3e182e5a09c351…

MALICIOUS

PDF

42.7 KB Created: 2021-05-15 00:07:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 407c43d360145d548ce02550b21f476b SHA-1: aa2200e4bb556435feb0bf904aefa89a92495894 SHA-256: ba3e182e5a09c351fca1311ce04e7e1a85454333f6f8eeddb36747f61c01ca20
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a game hack generator, directing users to a suspicious URL. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to potentially malicious content or downloads. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/master-8-ball-pool-free-coins-game-hack PDF link annotation
    • http://firesafetyservices.biz/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/what-is-wurst_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-com-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/hack-coin-master-game_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-game-pack-with-google-play-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-pink-free-robux_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/claim-roblox_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/coin-master-spin-blogspot_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-robux-real-working_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/roblox-avatar-girl_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://firesafetyservices.biz/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://firesafetyservices.biz/images/how-to-get-free-minecraft-skins_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_003_off00004a0c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A0C 25672 bytes
SHA-256: ff54ede4f1087a45a8164cb28e3a5fcb95791b3d450840e304f884f19dbdea61
font_01_sfnt_off000084a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 18364 bytes
SHA-256: 6e0a537e63e8d7ae493ffba7f694c0e5cbb50b5e44b8f04c82ad864b2eef269a

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