Malicious PDF — malware analysis report

Static analysis result for SHA-256 68fc8e95ae22ef24…

MALICIOUS

PDF

44.6 KB Created: 2021-06-10 18:20:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5cab2692bd59332bba152eff0d14d66c SHA-1: 2fc968bfe3316051d6718a9798be6c1838137b76 SHA-256: 68fc8e95ae22ef24827fb92eefd375b6e8b84a50202dc083fc42f84614a11913
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are structured as SEO-friendly slugs pointing to game-related hacks and cheats. The ML classifier strongly flagged this PDF as malicious, and the presence of a call-to-action phrase further supports a malicious intent. The primary goal appears to be driving traffic to these external sites, likely for SEO spam or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/how-to-get-free-robux-for-games-game-hack
    • http://www.sfakia-online.com/images/coin-master-free-spins-hack-2021_GM406889139.pdf
    • http://www.sfakia-online.com/images/minecraft-free-download-mac-full-version-2021_GM479516143.pdf
    • http://www.sfakia-online.com/images/free-tiktok-fans-and-likes_GM835599320.pdf
    • http://www.sfakia-online.com/images/free-robux-only-1-step_GM431946152.pdf
    • http://www.sfakia-online.com/images/how-to-wall-hack-in-roblox_GM431946152.pdf
    • http://www.sfakia-online.com/images/hacks-and-cheats-for-coin-master_GM406889139.pdf
    • http://www.sfakia-online.com/images/free-roblox-toy-codes_GM431946152.pdf
    • http://www.sfakia-online.com/images/codes-to-get-free-robux_GM431946152.pdf
    • http://www.sfakia-online.com/images/free-op-minecraft-servers_GM479516143.pdf
    • http://www.sfakia-online.com/images/minecraft-bedrock-edition-free_GM479516143.pdf
    • http://www.sfakia-online.com/images/hacking-roblox-fnaf-rp_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spin-codes_GM406889139.pdf
    • http://www.sfakia-online.com/images/free-robux-without-verification-2021_GM431946152.pdf
    • http://www.sfakia-online.com/images/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://www.sfakia-online.com/images/free-minecraft-windows-10-with-java_GM479516143.pdf
    • http://www.sfakia-online.com/images/minecraft-mobile-free_GM479516143.pdf
    • http://www.sfakia-online.com/images/coin-master-hack-https-coinms-net_GM406889139.pdf
    • http://www.sfakia-online.com/images/minecraft-jar-free_GM479516143.pdf
    • http://www.sfakia-online.com/images/haktuts-coin-master-free-spins_GM406889139.pdf
    • http://www.sfakia-online.com/images/how-to-get-free-robux-promo-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000515d.bin
df9caf19e3879a5059f6f0ea62435576fbb8040bfb23bf2cf33ec1ec6c5cb2c1
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x515D 24648 bytes
font_01_sfnt_off00008a30.bin
f0658a260a8345a08039bbf50682235c712e1d6bfd9b3eebd82ad720f29012b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A30 18768 bytes