Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb16c9166e6a5406…

MALICIOUS

PDF

33.5 KB Created: 2021-06-25 07:44:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 52c976d7da7e9b8b43425f00e412f162 SHA-1: 7370585cb1a32088f09d59933645ed3297fd9fec SHA-256: fb16c9166e6a540643672df650f7fd136fa43e1db517509ea34266e823672aa0
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to websites promising game cheats and currency, indicating a phishing or scam attempt. The ML classifier strongly flagged this PDF as malicious, and the presence of a link farm suggests an effort to distribute malicious content. While no scripts were directly extracted, the document's structure and embedded links point towards a malicious workflow, likely involving the exploitation of user interest in game hacks to redirect them to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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-mad-city-game-hack
    • http://kfz-service-etp.de/images/ultimate-free-spins-coin-master_GM406889139.pdf
    • http://kfz-service-etp.de/images/easy-coin-master-hack-without-verification_GM406889139.pdf
    • http://kfz-service-etp.de/images/roblox-the-pizzeria-rp-remastered-give-all-coins-hack-2021_GM431946152.pdf
    • http://kfz-service-etp.de/images/free-robux-codes-2021_GM431946152.pdf
    • http://kfz-service-etp.de/images/free-minecraft-alt-generator_GM479516143.pdf
    • http://kfz-service-etp.de/images/hackear-cuenta-de-roblox-2021_GM431946152.pdf
    • http://kfz-service-etp.de/images/roblox-promo-codes-generator-no-human-verification_GM431946152.pdf
    • http://kfz-service-etp.de/images/hack-robux-roblox-cheat-engine_GM431946152.pdf
    • http://kfz-service-etp.de/images/how-to-get-free-robux-and-tickets-on-roblox-2021_GM431946152.pdf
    • http://kfz-service-etp.de/images/roblox-mobile-robux-hack-generator_GM431946152.pdf
    • http://kfz-service-etp.de/images/free-robux-discord-servers_GM431946152.pdf
    • http://kfz-service-etp.de/images/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdf
    • http://kfz-service-etp.de/images/how-to-get-free-robux-by-doing-surveys_GM431946152.pdf
    • http://kfz-service-etp.de/images/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://kfz-service-etp.de/images/regal-world-coin-master_GM406889139.pdf
    • http://kfz-service-etp.de/images/get-free-robux-with-no-verification_GM431946152.pdf
    • http://kfz-service-etp.de/images/how-to-get-coin-master-free-spins-in-email_GM406889139.pdf
    • http://kfz-service-etp.de/images/80-free-spins-coin-master_GM406889139.pdf
    • http://kfz-service-etp.de/images/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • http://kfz-service-etp.de/images/roblox-admin-hack-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002afa.bin
44ee7612b1e96fc520a96648605bc3e2b61d2b2191d6b9a94f340f43983277c5
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFA 22532 bytes
font_01_sfnt_off00005d34.bin
d611f1a5342ffda706aef0007dac93aa4627be042ede170024578a2fe2fdc586
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D34 19424 bytes