Malicious PDF — malware analysis report

Static analysis result for SHA-256 bccdd1bd739405f6…

MALICIOUS

PDF

35.3 KB Created: 2021-07-04 20:40:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 15b0e0d993c6d827f492440159e5f10b SHA-1: f369c6b59a053b01dad48c0f8c25970dfd68fad5 SHA-256: bccdd1bd739405f6a1e7847ba0128323103f21c8fad745150eb69511636836c9
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 cheat and hack downloads. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic further supports a malicious intent to trick users into downloading further payloads. The document's primary function appears to be a link farm for distributing potentially harmful files.

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.tw/app/406889139/how-do-you-get-free-coins-in-coin-master-game-hack
    • http://sistem.amikomsolo.ac.id/perpus/repository/download-roblox-mod-free-robux_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-daily-free-spins_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-game-free-download-for-pc_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/strucid-aimbot_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/2021-hack-script-roblox_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-hack-jail-break-2021-roblox_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-coin-master-hacks-no-verification_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-get-free-robux-roblox-2021_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/vouchers-to-get-free-robux-2021_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-robux-codes-generator-no-verification_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/real-free-spins-for-coin-master_GM406889139.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-robux-sites-that-work_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-get-free-robux-without-verifying_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/minecraft-tiktok-hacks_GM479516143.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-robux-command_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/how-to-equip-knife-roblox-hack_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/free-roblox-jailbreak-vip-server-link_GM431946152.pdf
    • http://sistem.amikomsolo.ac.id/perpus/repository/moonactive-free-spins-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_off0000332b.bin
797eccdde9d9a1c2fdb1e125cf8fd1e52c000d36ff9e8921e7e57c4798570f59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x332B 22848 bytes
font_01_sfnt_off00006650.bin
2abc8992619921ee6f6a540de8a101266f6da6b5d00d63d7d50b9c09c57ae372		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6650 18632 bytes

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