Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b68fd4ba4e1b6ac…

MALICIOUS

PDF

42.0 KB Created: 2021-05-17 12:04:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 28488584c52d43d2142d3698f0ae3576 SHA-1: 72e7980a748910032e0712c67bb5dec0d8e89d28 SHA-256: 2b68fd4ba4e1b6ac98b16b8dab80197303527c55faa270245e96ce9f16d7b29a
102 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which appear to be SEO-optimized for free spins and game hacks. The ML classifier strongly indicates maliciousness, and the presence of a 'download button' heuristic suggests a lure. The primary attack pattern involves directing users to potentially malicious websites via these embedded links.

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/free-premium-roblox-game-hack
    • https://adues.org/images/all-links-for-free-spins-coin-master_GM406889139.pdf
    • http://adues.org/images/hack-my-spins-coin-master_GM406889139.pdf
    • http://adues.org/images/free-coin-spin-coin-master_GM406889139.pdf
    • http://adues.org/images/hacks-minecraft_GM479516143.pdf
    • http://adues.org/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdf
    • http://adues.org/images/roblox-hacks-com_GM431946152.pdf
    • http://adues.org/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://adues.org/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdf
    • http://adues.org/images/robux-online_GM431946152.pdf
    • http://adues.org/images/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdf
    • http://adues.org/images/coin-master-free-coins-and-spins-link_GM406889139.pdf
    • http://adues.org/images/how-can-you-get-free-spins-on-coin-master_GM406889139.pdf
    • http://adues.org/images/coin-master-pet-food-hack_GM406889139.pdf
    • http://adues.org/images/free-roblox-avatar_GM431946152.pdf
    • http://adues.org/images/roblox-free-online-game_GM431946152.pdf
    • http://adues.org/images/free-spins-coin-master-apple_GM406889139.pdf
    • http://adues.org/images/get-free-roblox_GM431946152.pdf
    • http://adues.org/images/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdf
    • http://adues.org/images/get-free-robux-today_GM431946152.pdf
    • http://adues.org/images/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047b1.bin
919a7c6698d391595ad346ed072bd4e43c046f10c3a49d34b479e17613850ebc		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47B1 25508 bytes
font_01_sfnt_off00008135.bin
db698e20de7c3d454232d28484b91ac7eeacd2d96f4c59a267e05c3027dbd208		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8135 18620 bytes

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