Malicious PDF — malware analysis report

Static analysis result for SHA-256 530aca1a6a55e599…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 19:17:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1d3857b4cb8100b824177833ac31602c SHA-1: 192bb1d0cb7bc153b1a9b89f93da01a899ee3099 SHA-256: 530aca1a6a55e59943b38b5c5a19d06afe2a02bc4f3bfe85494f9e392dbd295e
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous embedded URLs and a document body that mimics game cheat sites, strongly suggesting a lure for users to download malicious content. The ML classifier and PDF link farm heuristics indicate a high likelihood of malicious intent. The document's purpose appears to be distributing malware disguised as game cheats or hacks.

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/cheats-for-roblox-how-to-get-free-robux-2021-game-hack
    • http://www.psychom.com/storage/editor/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdf
    • http://www.psychom.com/storage/editor/files/minecraft-pe-hacked-client-download_GM479516143.pdf
    • http://www.psychom.com/storage/editor/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/robine-roblox-hack_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/roblox-games-to-play-for-free_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/speed-hack-mac-roblox_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/games-like-coin-master_GM406889139.pdf
    • http://www.psychom.com/storage/editor/files/coin-master-hack-activegamer_GM406889139.pdf
    • http://www.psychom.com/storage/editor/files/get-free-robux_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/minecraft-free-apk-java-edition_GM479516143.pdf
    • http://www.psychom.com/storage/editor/files/how-do-you-get-free-stuff-on-roblox_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/roblox-gift-card-for-free_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/robux-com-free-robux_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/free-robux-no-human-verification-or-survey_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/roblox-arsenal-hack-script-pastebin_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/codes-to-get-free-robux_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/free-coin-and-spin-in-coin-master_GM406889139.pdf
    • http://www.psychom.com/storage/editor/files/brdarski-free-robux_GM431946152.pdf
    • http://www.psychom.com/storage/editor/files/how-to-get-free-golden-card-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002da2.bin
443fb2ea863c0c83a871e4b0ffa7d0690f2087b165a535299a8c8001e7d3c284		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DA2 22444 bytes
font_01_sfnt_off00005f7c.bin
50a0a7a76aa9510b1cd6e48d3de0b42b241bce9f83a591af0a12ce9de90e0c2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F7C 19624 bytes

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