Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5137953b82a342…

MALICIOUS

PDF

35.2 KB Created: 2021-06-30 04:32:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: afd297f3a66bd31d698f11b9336f1dc4 SHA-1: b51ef7c3dbc8eb798bcace10851ba534f8cca2f6 SHA-256: 1d5137953b82a3420bce82bec72e142dc380272bec2299ddc15931fce5331c08
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are structured as SEO link farms. These links promote the download of files related to game cheats and hacks, suggesting a lure for users seeking unauthorized advantages. The ML classifier strongly indicated maliciousness, and the presence of a download button heuristic further supports the deceptive nature of the document.

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/free-roblox-adopt-me-pets-game-hack
    • http://fobh.net/userfiles/files/coin-master-links-free-spins_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-apk-mods-coin-master_GM406889139.pdf
    • http://fobh.net/userfiles/files/free-robux-no-human-verify_GM431946152.pdf
    • http://fobh.net/userfiles/files/roblox-robux-hack-with-cheat-engine-64_GM431946152.pdf
    • http://fobh.net/userfiles/files/minecraft-windows-10-edition-hacked-client_GM479516143.pdf
    • http://fobh.net/userfiles/files/roblox-mobile-hack_GM431946152.pdf
    • http://fobh.net/userfiles/files/easiest-coin-master-hack_GM406889139.pdf
    • http://fobh.net/userfiles/files/coin-master-hack-programmers_GM406889139.pdf
    • http://fobh.net/userfiles/files/avatar-de-roblox_GM431946152.pdf
    • http://fobh.net/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdf
    • http://fobh.net/userfiles/files/websites-that-give-free-robux_GM431946152.pdf
    • http://fobh.net/userfiles/files/free-robux-picture_GM431946152.pdf
    • http://fobh.net/userfiles/files/roblox-adopt-me-hack_GM431946152.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-spins-on-coin-master-2021-ios_GM406889139.pdf
    • http://fobh.net/userfiles/files/hack-para-roblox-jailbreak-2021_GM431946152.pdf
    • http://fobh.net/userfiles/files/100-free-spins-for-coin-master_GM406889139.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-limited-items-on-roblox_GM431946152.pdf
    • http://fobh.net/userfiles/files/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-gamepasses-on-roblox-no-hacking_GM431946152.pdf
    • http://fobh.net/userfiles/files/how-to-get-free-robux-as-a-kid_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000303c.bin
ad625d7191e08697d007b9a1ce4b67e836a5f3c692193c2d14b506226362a5b5
pdf-font-stream PDF embedded font (sfnt) at offset 0x303C 22820 bytes
font_01_sfnt_off00006339.bin
7b9be5883f45f02dbb03249ff61d9220e610f7b45a0bb0632252067c450821da
pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 19452 bytes