Malicious PDF — malware analysis report

Static analysis result for SHA-256 f036279e28d84c72…

MALICIOUS

PDF

33.6 KB Created: 2021-06-22 05:37:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 022ea3426401971c3b1e67f0972aa858 SHA-1: dda3af6a9ae0d177a99a539bad31c0586a9d2bca SHA-256: f036279e28d84c727d9cffe7273f8cbc2303c4319caf9029b681f1ae8015486f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-optimized and point to other PDF files, suggesting a link farm designed to lure users with game-related content. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate malicious intent. While no scripts were directly extracted, the PDF structure and link farm are indicative of a phishing or malware distribution attempt.

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-shirt-assets-leak-game-hack
    • http://d-cision.nl/images/hacks-for-minecraft-bedrock_GM479516143.pdf
    • http://d-cision.nl/images/extra-free-spins-for-coin-master_GM406889139.pdf
    • http://d-cision.nl/images/is-minecraft-education-edition-free_GM479516143.pdf
    • http://d-cision.nl/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://d-cision.nl/images/roblox-hack-tool_GM431946152.pdf
    • http://d-cision.nl/images/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://d-cision.nl/images/free-stuff-in-roblox-catalog_GM431946152.pdf
    • http://d-cision.nl/images/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://d-cision.nl/images/free-coin-master-s_GM406889139.pdf
    • http://d-cision.nl/images/minecraft-free-trial_GM479516143.pdf
    • http://d-cision.nl/images/rblx-gg-free-robux_GM431946152.pdf
    • http://d-cision.nl/images/minecraft-build-hacks_GM479516143.pdf
    • http://d-cision.nl/images/roblox36com-free-robux_GM431946152.pdf
    • http://d-cision.nl/images/roblox-hack-2021_GM431946152.pdf
    • http://d-cision.nl/images/easy-way-to-hack-roblox-accounts_GM431946152.pdf
    • http://d-cision.nl/images/ho-to-get-free-robux-in-roblox-on-the-pc_GM431946152.pdf
    • http://d-cision.nl/images/free-minecraft-mods-for-xbox-one_GM479516143.pdf
    • http://d-cision.nl/images/how-to-make-a-cool-free-roblox-acount_GM431946152.pdf
    • http://d-cision.nl/images/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://d-cision.nl/images/roblox-apocalypse-rising-shenanigans-mod-cheat-codes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002d24.bin
1be4988e28c30fac82cf7adc8dbc280b3a4f73d485c80be29b9a6bd9d16db354
pdf-font-stream PDF embedded font (sfnt) at offset 0x2D24 21860 bytes
font_01_sfnt_off00005db9.bin
472f1eea772762a00062bf5d1afeca56e601cbfeb9090872e6234d7c9c4ea8a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB9 19212 bytes