Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a592db3d0b09d77…

MALICIOUS

PDF

52.3 KB Created: 2021-06-09 05:58:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 36a28a2bad21a65265e952e08bd8389c SHA-1: ca3e472f8c5229320af0ba96f3c56802db45828c SHA-256: 2a592db3d0b09d77307ab1a6d4015d417a935fc5ced1a9dbc7cc180212f1d63b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links and a "download" lure, strongly suggesting a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. The presence of external URIs and a link farm indicates an attempt to redirect users to potentially harmful content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9441

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 https://netcdn.tw/app/431946152/best-free-roblox-items-2021-game-hack
    • http://perpus.i2s-learning.com/repository/free-robux-android_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/coin-master-free-spins-2021-generator_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/best-roblox-hacks_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-robux-rewards_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/how-to-hack-roblox-pet-traininer_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/minecraft-for-free-on-phone_GM479516143.pdf
    • http://perpus.i2s-learning.com/repository/free-spins-coin-master-2021-hack_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/how-to-get-free-roebucks-in-roblox_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/roblox-speed-hack_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/roblox-bloxburg-hack_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-robux-hack-no-verification_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/how-do-you-hack-roblox_GM431946152.pdf
    • http://perpus.i2s-learning.com/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://perpus.i2s-learning.com//repository/free-spin-in-coin-master_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/coin-master-free-attack-link_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/how-to-hack-coins-in-mcpe-master_GM406889139.pdf
    • http://perpus.i2s-learning.com//repository/android-coin-master-hack_GM406889139.pdf
    • http://perpus.i2s-learning.com/repository/how-to-actually-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005290.bin
1863d89b5c2a9a501237f9e43c008b96dab332729b422d596cd8e0833ee5cf24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5290 24912 bytes
font_01_sfnt_off00008c3f.bin
ddfd86c88a6b8304bc31eeb9f28c8110fac325cdacc87503bacf4ac741777490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C3F 8704 bytes
font_02_sfnt_off0000a8a9.bin
d56272f5fb32f4fe0d35c4a5a82878b804359a4c72742e713b9fe0fcc6e58a94		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8A9 18716 bytes

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