Malicious PDF — malware analysis report

Static analysis result for SHA-256 373ff7a149845fd9…

MALICIOUS

PDF

43.5 KB Created: 2021-05-16 06:36:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 76d5896f940025fd06be29bd266043e8 SHA-1: 50d5743844288e4c4e661060e6102e90aa0a1e00 SHA-256: 373ff7a149845fd995a53fedccb21a62b46eee2d9ba474e73fe0a18cc7d69949
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which are part of a link farm designed to direct users to potentially malicious websites. The document body, though heavily obfuscated, contains references to game cheats and free spins, indicating a lure for users interested in such topics. The presence of external URIs and a high ML classifier score strongly suggest malicious intent, likely to facilitate phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/coin-master-daily-free-spins-link-today-blogspot-game-hack
    • http://bassacctaxservices.com/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdf
    • http://bassacctaxservices.com/images/coin-master-free-coins_GM406889139.pdf
    • http://bassacctaxservices.com/images/coin-master-gift-link-hack_GM406889139.pdf
    • http://bassacctaxservices.com/images/www-free-robux_GM431946152.pdf
    • http://bassacctaxservices.com/images/robux-cheat_GM431946152.pdf
    • http://bassacctaxservices.com/images/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdf
    • http://bassacctaxservices.com/images/coin-master-game-legitimate-hack-without-signing-up-or-shareing_GM406889139.pdf
    • http://bassacctaxservices.com/images/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://bassacctaxservices.com/images/free-spins-coin-master-2021-today_GM406889139.pdf
    • http://bassacctaxservices.com/images/minecraft-survival-hacks_GM479516143.pdf
    • http://bassacctaxservices.com/images/free-redeem-code-for-coin-master_GM406889139.pdf
    • http://bassacctaxservices.com/images/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://bassacctaxservices.com/images/coin-master-hack-apk-free-download_GM406889139.pdf
    • http://bassacctaxservices.com/images/can-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://bassacctaxservices.com/images/how-many-villages-are-in-coin-master_GM406889139.pdf
    • http://bassacctaxservices.com/images/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://bassacctaxservices.com/images/best-minecraft-hacked-client_GM479516143.pdf
    • http://bassacctaxservices.com/images/free-links-for-coin-master_GM406889139.pdf
    • http://bassacctaxservices.com/images/free-spins-coin-master-october-13-2021_GM406889139.pdf
    • http://bassacctaxservices.com/images/robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a24.bin
6a64f8596e80461edcc6468e65cc469ded9b1958173f7b63e1d5cbcf7766aa09
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A24 25556 bytes
font_01_sfnt_off0000852a.bin
c6e44e2d9e69c9765448dadb9ef0e8fe599e3907f261bb989cdf753410e037ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x852A 19156 bytes