Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b94aafb232bdc4d…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 14:51:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 13f36bca5f12f705b770db61c4f423c7 SHA-1: 22f4e9625b9a5a707899abd74a28df069b15c025 SHA-256: 8b94aafb232bdc4d16bae4ca10c0ec421d159bc7150f25f89955fdf7e8ee2308
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 "download button" lure, strongly suggesting an attempt to trick the user into downloading a secondary payload. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs indicate a theme of game cheats and hacks, likely serving as a lure for malicious downloads.

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-cheat-codes-for-pc-game-hack
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-hack-roblox-accounts_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-dop-the-flying-hack-in-roblox_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/robux-codes-free-2021_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/get-free-spins-link-in-coin-master_GM406889139.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hacks-2021_GM406889139.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-no-hack-or-cheat_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-hack-robux-generator-no-human-verification_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/get-free-robux-without-human-verification_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/im-being-called-a-hacker-on-roblox_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/estan-hackeando-roblox-13-08-19_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/bloxland-earn-free-robux_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-pour-avoir-des-robux-facilemen_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/hack-para-jailbreak-roblox-pc_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-cruise-ship-tyccon-albatros-free-script_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-cards-for-free_GM406889139.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/buy-tiktok-followers-free_GM835599320.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/coin-master-hack-2021_GM406889139.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/roblox-free-body_GM431946152.pdf
    • http://uilis.unsyiah.ac.id/ebook/repository/how-to-get-free-robux-and-bc_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ff9.bin
cfdb99731acb8c87cd0ebd53a7bd22841dacc8002c09e623e1e248d0a7af7305
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF9 22508 bytes
font_01_sfnt_off0000625b.bin
f04fed8c70d48a48b25a8035ab0007867e49dec696ae0f955650eac5255f3391
pdf-font-stream PDF embedded font (sfnt) at offset 0x625B 19248 bytes