Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef62daa96646eaf…

MALICIOUS

PDF

33.9 KB Created: 2021-06-20 13:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9f5a124a9333915cb650f5ee29e948fc SHA-1: ac57dcaf261572f98baf69e571b6f4c5b44644c3 SHA-256: cef62daa96646eaf17a76033868064fdc1a9a276970b15d36a11e28293a30387
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a link farm, strongly suggesting it is designed to redirect users to malicious websites. The content and URLs indicate a lure for game-related cheats or hacks, a common tactic for distributing malware or engaging in phishing. The ML classifier also flagged this PDF as malicious with high confidence.

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/cyber-roblox-hack-game-hack
    • http://perpus.stmik-im.ac.id/repository/free-robux-hack-no-human-verification_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/100-free-spins-coin-master_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/ulgamesresources-com-roblox-hack_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-daily_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/robuxy-com-free-robux_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/hack-coin-master-apk-mod_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/free-accounts-free-robux-and-obc_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/best-free-troll-avatars-roblox_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/lazy-blocks-com-free-robux_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/minecraft-the-complete-handbook-collection_GM479516143.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-coin-master-computer_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/easy-way-to-get-robux-for-free-2021_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdf
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-apps_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spins-apple_GM406889139.pdf
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • http://perpus.stmik-im.ac.id/repository/roblox-meep-city-10000-cheats_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e03.bin
05e667effd26f9482c0eba33c3181e54fb4a752b67f72e37bf885a7a49467df2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E03 22352 bytes
font_01_sfnt_off00005fc7.bin
99ede1879785e95e46021c0ae7b88d8c4adee72cbe62cdd8843c8cf3336ba521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FC7 18836 bytes

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