Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b67758d843ef535…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 09:27:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ed816a598cd61143e74c9a29cbeea8a9 SHA-1: 5a2436fa2aba36d0f7e5fcd2726700b9f1940f2e SHA-256: 6b67758d843ef5356e673b74906b3f80dd9f649700ce60ca153783f5a68fe8ce
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 external links, many of which are SEO-optimized and point to game-related hacks and cheats, suggesting a lure for users to download malicious content. The presence of a 'download button' heuristic further supports this malicious intent. The ML classifier also strongly flagged this PDF as malicious.

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/guuudd-info-roblox-online-hack-game-hack
    • http://www.thecoffeebaron.co.za/images/coin-master-hack-download-2021_GM406889139.pdf
    • http://www.thecoffeebaron.co.za/images/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdf
    • http://www.thecoffeebaron.co.za/images/free-roblox-shirt-template-nurse_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/how-to-get-free-clothe-roblox_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/how-to-hack-robux-2021-in-1-min_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/best-roblox-fps-unlocker-free_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/will-roblox-be-free-on-ps4_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/minecraft-bedrock-free-download-pc_GM479516143.pdf
    • http://www.thecoffeebaron.co.za/images/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://www.thecoffeebaron.co.za/images/roblox-robux-hack_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/a-free-trial-on-roblox_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/robux-matchcomfree-robux_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/roblox-number-to-get-free-robux_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/free-minecraft-skin-packs_GM479516143.pdf
    • http://www.thecoffeebaron.co.za/images/free-roblox-giveaway-accounts_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/free-renders-roblox_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/games-that-give-free-robux_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://www.thecoffeebaron.co.za/images/free-minecraft-bedrock_GM479516143.pdf
    • http://www.thecoffeebaron.co.za/images/free-coins-coin-master-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fe2.bin
941db0cef7481c5dd0b631d49a7d267d1b225996e784117882f96bd7b8d3d881
pdf-font-stream PDF embedded font (sfnt) at offset 0x2FE2 22272 bytes
font_01_sfnt_off00006178.bin
e7bfc6e75650152d93fe90f5030c1badde9eb1e0eef2c7f4008c44c31a456e12
pdf-font-stream PDF embedded font (sfnt) at offset 0x6178 19088 bytes