Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d4f00cf61f045a2…

MALICIOUS

PDF

32.6 KB Created: 2021-06-17 22:27:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 0c6c29d76b2990a85a8c2439db1587a0 SHA-1: bd78fa665366118221d616fbfc69d86d627f6bd6 SHA-256: 6d4f00cf61f045a210ed183b7dd943e375060c1fe778c2687dc8710b0b47f351
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links to external websites, many of which are SEO-optimized and appear to be part of a link farm designed to attract users searching for free in-game items. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly indicate malicious intent. The document body, while containing some obfuscated text, clearly references 'free robux hacks' and 'game hack', aligning with a phishing or malware distribution lure.

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/robuxian-free-robux-hacks-game-hack
    • https://tanahlot.id/assets/CKImages/files/free-robux-games-that-actually-work_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • https://tanahlot.id/assets/CKImages/files/top-free-commands-in-roblox-without-admin_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/how-to-get-free-robux-not-a-scam_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/free-coin-master-game_GM406889139.pdf
    • https://tanahlot.id/assets/CKImages/files/free-spins-coin-master-blogspot_GM406889139.pdf
    • https://tanahlot.id/assets/CKImages/files/coin-master-hack-android-no-root_GM406889139.pdf
    • https://tanahlot.id/assets/CKImages/files/games-that-give-you-free-robux_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/roblox-free-accessories_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/coin-master-free-spins-and-coins-app_GM406889139.pdf
    • https://tanahlot.id/assets/CKImages/files/roblox-got-hacked-2021_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/roblox-script-executor-free_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/robux-gift-card-free_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/how-to-add-mods-to-minecraft-pe_GM479516143.pdf
    • https://tanahlot.id/assets/CKImages/files/free-minecraft-bedrock-server-hosting_GM479516143.pdf
    • https://tanahlot.id/assets/CKImages/files/free-robux-download_GM431946152.pdf
    • https://tanahlot.id/assets/CKImages/files/best-minecraft-hacked-client_GM479516143.pdf
    • https://tanahlot.id/assets/CKImages/files/coin-master-spin-free_GM406889139.pdf
    • https://tanahlot.id/assets/CKImages/files/get-free-tiktok-likes_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002c9b.bin
ce57ca0bd7e2ba145d63817ae1988ce71144450d9fb546d654c07cb35412e46e
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C9B 21276 bytes
font_01_sfnt_off00005ad6.bin
588bc4a4d22dd8b3bfbce1e8a65c2fa59b3815d90f66829206a108260a98a61e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD6 18820 bytes