Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4bdb01b194f1454…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 22:41:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c991ef6733bd5b4a7e5f8397d6a9e439 SHA-1: 081e7b05b4db2a8ecbc5ea4ae24b447784b2cf3c SHA-256: c4bdb01b194f14541a27fffb0b29ce1876d1ae02eddd45f831db2eefcbeaf6ca
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs and a link farm structure, strongly suggesting it is designed to redirect users to malicious websites. The document body and heuristics indicate a lure for game hacks and cheats, likely leading to malware downloads or further exploitation. The ML classifier's high confidence score further supports the malicious nature of this file.

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/406889139/coinmaster-blogspot-game-hack
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-dying-sound-free_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/hack-roblox-hydra_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-mod-game-download_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-hack-apk-ios-download_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/moonactive-coin-master-free-spins_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-free-robux-202100_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/hey-google-how-to-get-free-robux_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-csgo-skins-roblox-id-audio_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-generator-no-robot-verification_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-roblox-jump-exploiut_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-on-roblox-group_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/minecraft-reach-hack_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-hack-generator_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/cheats-coin-master-free_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-coin-master-game_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/blogspot-coin-master-free-spins_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-on-phone_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f03.bin
862c0d41985ebb1138beb1f1dd9b39edbe456ba1068a7bbd3d3608d9d3b7df9a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F03 22752 bytes
font_01_sfnt_off000061de.bin
c633d1bdcec2ec97d0cf5d0105340ca0f72dc1a1e70e85eb1730fe196c137425		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61DE 18560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.