Malicious PDF — malware analysis report

Static analysis result for SHA-256 079103b4c350b9e2…

MALICIOUS

PDF

34.7 KB Created: 2021-07-06 04:26:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8e1f58dde2c2ceca643c1c78b5494000 SHA-1: 80fdc5817baeedf787ca1beefd38642217373c7c SHA-256: 079103b4c350b9e2e1e1211c70b78438ca7e6005a7fd7488582038c622e44cd8
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 0.9980

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/431946152/roblox-hack-download-game-hack PDF link annotation
    • http://fishboat.hr/files/win-2021-free-robux_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/como-hackear-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.fishboat.hr/files/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-watch-any-movie-for-free-tiktok-hack_GM835599320.pdfIn PDF document text
    • https://www.fishboat.hr/files/get-free-robux-script_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/robux-free-online_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/roblox-follower-hack-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-spins_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/moon-active_GM406889139.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/how-to-get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/minecraft-pe-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://www.fishboat.hr/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/how-to-get-free-robux-in-inspect_GM431946152.pdfIn PDF document text
    • https://www.fishboat.hr/files/free-robux-mobile_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://fishboat.hr/files/free-clothes-roblox-no-hack_GM431946152.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_off00002fb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB7 22532 bytes
SHA-256: a0f0899fbe6d488bb0d84aad65d1cbf4db9e58727184266d8d96e071b4af0a3c
font_01_sfnt_off000061fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FE 19160 bytes
SHA-256: 20e8ef43e122870d61f5f3bdc7785651657b4c6f8223466300bbb50b4def8f00

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