Malicious PDF — malware analysis report

Static analysis result for SHA-256 daca2d4082a9f0be…

MALICIOUS

PDF

32.0 KB Created: 2021-07-05 00:52:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: e9b71d85a19c80bb92e217540538e028 SHA-1: fc55fac325c187201a08fb5db4be89a9086ed87a SHA-256: daca2d4082a9f0be6e1b19c09fe83f18ee6290a8f97e8aa8d11f06cdbdd4e512
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a document body that promotes game hacks and cheats, aiming to trick users into clicking malicious links. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, suggesting a link farm or SEO poisoning tactic to distribute malware. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/coin-master-hack-ios-no-jailbreak-game-hack
    • http://opac.library.uib.ac.id/repository/roblox-simple-robo-for-free_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/free-roblox-accounts-2021_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/get-minecraft-for-free_GM479516143.pdf
    • http://opac.library.uib.ac.id//repository/minecraft-classic-free_GM479516143.pdf
    • http://opac.library.uib.ac.id/repository/i-got-hacked-playing-roblox_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-links-to-get-free-spins_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/free-robux-codes-2021-not-used_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/legit-coin-master-hack-october-2021_GM406889139.pdf
    • http://opac.library.uib.ac.id//repository/coin-master-hack-apk-link_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-date-and-time-hack_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/coin-master-hack-apk-with-fb-login_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/roblox-robux-hack-generator_GM431946152.pdf
    • http://opac.library.uib.ac.id//repository/how-to-download-wurst_GM479516143.pdf
    • http://opac.library.uib.ac.id/repository/is-there-any-way-to-get-free-robux-on-roblox_GM431946152.pdf
    • http://opac.library.uib.ac.id/repository/free-minecraft-server-hosting_GM479516143.pdf
    • http://opac.library.uib.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdf
    • http://opac.library.uib.ac.id/repository/minecraft-116-1-download_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002abd.bin
f84b3fff3ab246c336ea48e0e9fd7527be730836c103391f40768227b8391407		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2ABD 21700 bytes
font_01_sfnt_off00005a2e.bin
345b4b10f5918f406b1f79bf6dc118df3430b7a97c564e099ef402e5b5a3dc62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A2E 18404 bytes

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