Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d905fc8832fee67…

MALICIOUS

PDF

34.4 KB Created: 2021-06-28 22:20:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3eaecd8008c9d3c6c0de5b51ceec48b1 SHA-1: fe131459edd89a29076c1bfdb881eea7c75c0d8f SHA-256: 2d905fc8832fee6708b44d415c32c6cf8c0ebe1821267ea2828ea0c78991de54
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes downloads for game cheats and hacks, indicating a lure for users to download potentially malicious software. The ML classifier and heuristic firings strongly suggest malicious intent, likely to distribute malware disguised as game-related tools. The presence of many external links points towards a link farm or content aggregation strategy to distribute these lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/roblox-brick-bronze-cheat-engine-game-hack
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/minecraft-mods-download-free_GM479516143.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-games-on-roblox_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-coin-master-coins-and-spins_GM406889139.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/what-is-a-minecraft-client_GM479516143.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/roblox-jailbreak-games-for-free_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-gift-card-codes_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/google-how-do-you-get-robux_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/how-to-get-2021-robux-on-roblox-for-free_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-roblox-game-image_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-hack-scripts-for-roblox_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/roblox-high-school-how-to-get-free-gear_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-tiktok-fans-no-human-verification-or-downloading-apps_GM835599320.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/is-minecraft-bedrock-edition-free_GM479516143.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-minecraft-skin-packs_GM479516143.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-random-robux-codes_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/roblox-fun-com-free-robux_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-coin-master-coins_GM406889139.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/no-scam-free-robux_GM431946152.pdf
    • http://lkp.cz/FRONTEND/IMG/PICTURES/files/free-robux-group-payouts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fa7.bin
787ed652b1e6a21f5e5539e41b71a52a100cb0abffdc3e7d01356bfef7e0111e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA7 22340 bytes
font_01_sfnt_off000060fe.bin
622cc3dee28600af6aa0bad5a438f4897a683a64ebbd1178f61939c8b4cd25ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x60FE 19128 bytes