Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4937129ad728733…

MALICIOUS

PDF

45.3 KB Created: 2021-05-17 13:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 033f65638a8cc2fad245bb04a5800370 SHA-1: 7b95756fb98464e1e55809f372312ba5be1bba4f SHA-256: d4937129ad728733cb9c091b67cd65f2101776a1dfa2c7b8a8c02fefd2c2d0d5
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links to external websites, many of which are structured as SEO-optimized PDF link farms. The document body and extracted URLs suggest a lure for game cheats and virtual currency, a common tactic for credential harvesting or distributing further malware. The 'SE_SECRET_RECOVERY_LURE' heuristic indicates the document may also attempt to solicit sensitive information like private keys or recovery phrases.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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-master-hack-programmers-game-hack
    • http://whiteyaknepal.com/userfiles/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/ways-to-get-free-robux_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-survey_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/daily-coin-master-free-link_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/robux-no-verification_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spin-link-today-2021_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-no-human-verification_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-minecraft-for-free_GM479516143.pdf
    • http://whiteyaknepal.com/userfiles/files/free-spin-link-coin-master_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-videos_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/25-free-spins-coin-master_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/how-do-you-get-free-robux-without-paying_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/free-robux-app-2021_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/roblox-free-robux_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-hack-spins-download_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/coin-master-free-spin-link-today-50_GM406889139.pdf
    • http://whiteyaknepal.com/userfiles/files/giftrobux-com-generator_GM431946152.pdf
    • http://whiteyaknepal.com/userfiles/files/password-free-roblox-accounts_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b65.bin
c14e2026d19c4d9d78472ce2d7f06c07fe6449bcac8a4348bf088dcc83acd5f0		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B65 25120 bytes
font_01_sfnt_off00008494.bin
3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8494 2840 bytes
font_02_sfnt_off00008e45.bin
9b1b86d518bbcbecce2ac7037f2b10fa6fa9b3d2e28cf0c2cd03817ae8459785		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E45 18416 bytes

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