Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2eb5d7224c4e80…

MALICIOUS

PDF

35.1 KB Created: 2021-06-22 00:20:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6480cfc547dde3b70887d0d378e280a8 SHA-1: 73c9d9e0d052edacb3188e384390b99fad58d225 SHA-256: 2a2eb5d7224c4e80a18751de181565d1478223be35063075f0d409fb3599ee52
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are structured as SEO-optimized links pointing to game-related cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a link farm suggests an attempt to drive traffic to potentially malicious download sites. The document body, though partially garbled, contains references to game cheats and download URLs, reinforcing the lure.

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/room-on-roblox-cheats-game-hack
    • http://huananhai.net/images/best-way-to-get-free-robux_GM431946152.pdf
    • http://huananhai.net/images/compte-roblox-hack_GM431946152.pdf
    • http://huananhai.net/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdf
    • http://huananhai.net/images/how-to-hack-robux_GM431946152.pdf
    • http://huananhai.net/images/free-fortune-roblox_GM431946152.pdf
    • http://huananhai.net/images/free-roblox-adopt-me-pets_GM431946152.pdf
    • http://huananhai.net/images/roblox-murdere-mystery-2-candy-hack_GM431946152.pdf
    • http://huananhai.net/images/how-to-hack-in-assassin-roblox-2021_GM431946152.pdf
    • http://huananhai.net/images/como-ser-hacker-en-roblox-sin-descargar-nada_GM431946152.pdf
    • http://huananhai.net/images/free-minecraft-hacks_GM479516143.pdf
    • http://huananhai.net/images/how-to-get-free-robux-by-playing-meep-city_GM431946152.pdf
    • http://huananhai.net/images/get-free-robux-2021_GM431946152.pdf
    • http://huananhai.net/images/coin-master-free-coins-and-spins-blogspot_GM406889139.pdf
    • http://huananhai.net/images/how-to-hack-roblox-games_GM431946152.pdf
    • http://huananhai.net/images/robux-no-human-verification-2021_GM431946152.pdf
    • http://huananhai.net/images/earn-free-robux-on-roblox_GM431946152.pdf
    • http://huananhai.net/images/minecraft-mobile-free_GM479516143.pdf
    • http://huananhai.net/images/free-vip-server-for-roblox-gravity-shift_GM431946152.pdf
    • http://huananhai.net/images/how-to-get-free-robux-com_GM431946152.pdf
    • http://huananhai.net/images/how-to-get-free-vip-in-roblox-fashion-famous_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003015.bin
f6c64c328be47bfd5e52a89a934c5cbbac02bafa8d79bd2051fa577e74dbbf02
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3015 23052 bytes
font_01_sfnt_off00006449.bin
f7b303abb521608ee1d9eec38df26fa56fd68b4c3223e69c4547244d22c68d9e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6449 19016 bytes