Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8220c0eca99045f…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 07:31:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 9960fb89f0279f3559e21c65891cade6 SHA-1: 37353f54e5b3fd39428712b8ec7e2b2878ec25eb SHA-256: f8220c0eca99045ffda24c622ca32ba2bff35907a14ce40bdfe9d662bb9bd980
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external resources, many of which are presented as "how-to-hack" guides for popular games. The heuristic PDF_SEO_LINK_FARM indicates a large number of such links, suggesting a link farm designed to attract users. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this PDF, likely intended to distribute malware or lead users to phishing 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.co/app/431946152/how-to-hack-treadmills-roblox-heigth-lifting-sim-game-hack
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/roblox-adopt-me-hack_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-for-unlimited-money_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-spin-and-coins-free_GM406889139.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-sound-daily-free-spins-link-today_GM406889139.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-robux-real-2021_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/master-coin-free-link_GM406889139.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-actually-get-free-robux_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/roblox-free-body_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-robux-hacks-no-verification_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/get-free-spins-for-coin-master_GM406889139.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/how-to-make-robux_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-game-hacking-tricks_GM406889139.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/robux-hack-tool-2021_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-tiktok-followers-without-human-verification-2021_GM835599320.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-minecraft-items-in-roblox_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/roblox-free-robux-no-human-verification_GM431946152.pdf
    • http://elearning.man1metro.sch.id/__statics/gudangsoal/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000320f.bin
dd2293556dbd9379271dfe022da230c3d07a036717da500afc0a26d55b100264		 pdf-font-stream PDF embedded font (sfnt) at offset 0x320F 22096 bytes
font_01_sfnt_off00006344.bin
0cf25365d5586756324ac8e1eaa83da7c59c2462049e1f1c639a9dfd7c5577fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6344 19644 bytes

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