Malicious PDF — malware analysis report

Static analysis result for SHA-256 57170afaa7022552…

MALICIOUS

PDF

43.0 KB Created: 2021-05-13 04:31:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: bb9b006791b155756cc24a4df367fffd SHA-1: e1d7d0849c308a14b2b3d881ba76366c9df11795 SHA-256: 57170afaa7022552a6716b6c4edf1a46c361b6facc7ea93bf62529861a26d043
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, pointing to sites offering 'hacks' and 'free currency' for games like Roblox and Coin Master. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a phishing or malware distribution attempt. No scripts were extracted, but the document body and heuristics indicate a lure for users to click through to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/431946152/how-to-hack-roblox-accounts-game-hack
    • http://neltalen.nl/images/roblox-rape_GM431946152.pdf
    • http://neltalen.nl/images/roblox-avatar-girl_GM431946152.pdf
    • http://neltalen.nl/images/get-free-spins-on-coin-master-links_GM406889139.pdf
    • http://neltalen.nl/images/free-spins-coin-master-2021-no-verification_GM406889139.pdf
    • http://neltalen.nl/images/how-do-i-get-free-coins-on-coin-master_GM406889139.pdf
    • http://neltalen.nl/images/coin-master-free-spins-links-app_GM406889139.pdf
    • http://neltalen.nl/images/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://neltalen.nl/images/coin-master-cheat-codes-free_GM406889139.pdf
    • http://neltalen.nl/images/village-4-coin-master_GM406889139.pdf
    • http://neltalen.nl/images/completed-coin-master-hack_GM406889139.pdf
    • http://neltalen.nl/images/coin-master-apk-hack-2021_GM406889139.pdf
    • http://neltalen.nl/images/free-coins-on-coin-master_GM406889139.pdf
    • http://neltalen.nl/images/free-attacks-on-coin-master_GM406889139.pdf
    • http://neltalen.nl/images/free-coin-master-spins-blogger_GM406889139.pdf
    • http://neltalen.nl/images/how-to-hack-coin-master-spin_GM406889139.pdf
    • http://neltalen.nl/images/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://neltalen.nl/images/robux-free-promo-codes_GM431946152.pdf
    • http://neltalen.nl/images/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://neltalen.nl/images/how-to-hack-roblox-to-get-robux_GM431946152.pdf
    • http://neltalen.nl/images/roblox-hacks-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000479e.bin
9311edc6932849a6c76743b41f46a624bdb37ee4abca48409c635cf61b58fe4b		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479E 26148 bytes
font_01_sfnt_off000084b3.bin
7bfa318362f39458d7d6cfaed4b7fb6212c616d22e88bbb7e9e73b07c323fe95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84B3 18588 bytes

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