Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1266d5c378b3f98…

MALICIOUS

PDF

40.6 KB Created: 2021-05-15 22:37:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 693dcdb991d9b84a196d35a504ceb7c6 SHA-1: 29b884b4666f1be91a0879bdd1a2fe9f818753b6 SHA-256: e1266d5c378b3f98570f5c2997acfa8eaa30e181ddb0630869abcbcaf19b5d44
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous external links, many of which appear to be SEO spam related to popular games and hacks. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the 'ML_NYX_PDF_MALICIOUS' score is very high. The presence of a 'SE_PASSWORD_ARCHIVE_LURE' suggests an attempt to trick users into believing they need a password for an archive, which is a common tactic to bypass security scans.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 https://netcdn.xyz/app/406889139/coin-mast-hacks-game-hack
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-without-any-verification_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/free-robux-no-email_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/where-can-i-get-free-coins-for-coin-master_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/how-to-get-free-followers-on-roblox_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/minecraft-ios-mods_GM479516143.pdf
    • https://library.stikesmi.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/games-for-robux_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/coin-master-hack-link_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/free-coin-and-spin-link_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/free-roblox-accounts-that-work_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/coin-master-hack-apk-latest-version-2021_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/free-attacks-on-coin-master_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/free-robux-no-scam_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/coin-master-hack-injection_GM406889139.pdf
    • https://library.stikesmi.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • https://library.stikesmi.ac.id/repository/coin-master-heaven-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000479a.bin
5d4225bcc06e5e886d1794c454cbdf2ba20589a76b28aa4f293ae72817f6173a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x479A 24460 bytes
font_01_sfnt_off00007dd8.bin
777b684355b1eef5a972c4758674727e521bcb83e374608eb379fd1ca070469a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DD8 17716 bytes

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