Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9236b83bf3a633f…

MALICIOUS

PDF

32.9 KB Created: 2021-06-25 23:58:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8bc0db85e8de35892dff004d1faf0e12 SHA-1: 9cb3aae1f4300f4636d552f259bfcf6c265f0b60 SHA-256: c9236b83bf3a633fc1d7f49fec0e4ef9b7cf385f69ca0a2bb1047e3fcbf8d09e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document employs a lure related to game hacks and cheats, specifically mentioning 'Fnaf Roblox Songs Cheats' and 'Robux Generator'. It contains numerous embedded URLs, with the primary one being http://netcdn.co/app/431946152/fnaf-roblox-songs-cheats-game-hack, which likely leads to a malicious download or phishing page. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' suggests a common tactic to bypass security scanners by instructing the user to open a password-protected archive, further indicating malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.co/app/431946152/fnaf-roblox-songs-cheats-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/coin-master-hack-apk-facebook-login_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-website-games_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-password-hacker_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/play-games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-skin-roblox-strucid_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-fast_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-client-download_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-meep-city-coins-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-game-glicth_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-asset-download-for-t-shirt-template-free_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-free-spins-link-october-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-make-a-group-for-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/code-how-to-get-2021-free-crystals-roblox-skybound-2_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/wiek-ann-man-sich-robux-hacken_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-clothing-roblox-catalog_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-cheat-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/robux-hack-tools_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
stream_001_off00002af7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AF7 22316 bytes
SHA-256: 061c25d8d89fd87e78f889d028f8be5f48a2833d2e92c9659514df56fc5f4826
font_01_sfnt_off00005c55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C55 18920 bytes
SHA-256: 9ea1889fcd507fe2f893eba012cc0b7608bd41ef00c29dbf74ca2d99d0edf214

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