Malicious PDF — malware analysis report

Static analysis result for SHA-256 3608d956da5db6e7…

MALICIOUS

PDF

34.0 KB Created: 2021-07-03 14:27:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eb128dd5337f0bcea3264510a24e38c4 SHA-1: 9a214a0c001450791aaf30813fe5eaf1aeb3b21b SHA-256: 3608d956da5db6e7eb0ab261b0e22b552c7f6245e2dafd79adf23cfe9e7e349c
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO-optimized PDF documents, suggesting a link farm or scam operation. The document body and extracted URLs explicitly mention 'Free Robux' and 'Coin Master free spins', indicating a lure for users seeking in-game currency. The ML classifier strongly flagged this PDF as malicious, and the presence of many external links supports a malicious intent to redirect users to potentially harmful sites.

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/431946152/free-robux-cards-game-hack
    • http://library.darmaagung.ac.id//repository/get-free-robux-now_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/how-to-get-free-knives-in-roblox-assassin-2021_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/how-to-get-free-20210-robux-esay-and-fast_GM431946152.pdf
    • http://library.darmaagung.ac.id//repository/coin-master-free-spins-facebook_GM406889139.pdf
    • http://library.darmaagung.ac.id/repository/guess-the-logo-cheat-on-roblox_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/free-videos-roblox_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/haktuts-2021-coin-master-free-spin-link_GM406889139.pdf
    • http://library.darmaagung.ac.id/repository/legends-of-speed-roblox-cheat-engine_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/easy-robux-today-com_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/get-robux-today_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdf
    • http://library.darmaagung.ac.id/repository/free-robux-pins_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/coin-master-hack-2021-android_GM406889139.pdf
    • http://library.darmaagung.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/free-account-roblox-2021_GM431946152.pdf
    • http://library.darmaagung.ac.id//repository/coin-master-free-mighty-lion-card_GM406889139.pdf
    • http://library.darmaagung.ac.id//repository/coin-master-spin-link-2021_GM406889139.pdf
    • http://library.darmaagung.ac.id//repository/free-promo-codes-for-robux_GM431946152.pdf
    • http://library.darmaagung.ac.id/repository/free-robux-no-human-verification-2021_GM431946152.pdf
    • http://library.darmaagung.ac.id//repository/free-robux-no-verification-no-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fb9.bin
fec2729180fd1c95e98d591026db4094c249c8d10f1cd43460f5db3c8be7bea0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB9 21924 bytes
font_01_sfnt_off0000600a.bin
6c6de0ceaed5fc014d3dcce92ca1cb896bf7995edf6e50a0e815779b2f83a656		 pdf-font-stream PDF embedded font (sfnt) at offset 0x600A 18888 bytes

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