Malicious PDF — malware analysis report

Static analysis result for SHA-256 409793031bee75be…

MALICIOUS

PDF

35.4 KB Created: 2021-07-05 19:30:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 08a67dac867eeca1db4f99f0585ad5dc SHA-1: d15b85f6e74dd9c078968a1f5e9090b71601b3f8 SHA-256: 409793031bee75bede6e13b4ec9bbcdcfc4ac686b6d636b4fa44ba0105d991ac
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and text lures related to free in-game currency and hacks, indicating a phishing or scam attempt. The PDF_SEO_LINK_FARM heuristic suggests a large number of external links were generated, likely to distribute malicious content or engage in SEO abuse. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of this PDF.

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-no-human-verification-no-survey-game-hack
    • http://biblioteca.ganexa.edu.pa/repository/hack-coin-master-online-without-human-verification_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/free-injector-roblox-hacks_GM431946152.pdf
    • http://biblioteca.ganexa.edu.pa/repository/is-windows-10-minecraft-free_GM479516143.pdf
    • http://biblioteca.ganexa.edu.pa/repository/equillex-how-to-get-free-robux-and-builders-club_GM431946152.pdf
    • http://biblioteca.ganexa.edu.pa/repository/free-minecraft-skin-packs_GM479516143.pdf
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/free-spins-and-coins-coin-master-links_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-hack-no-survey-or-verification_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/roblox-robux-hack-ohne-handynummer_GM431946152.pdf
    • http://biblioteca.ganexa.edu.pa/repository/how-to-duplicate-coin-master-spin-hack_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-spain_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/how-to-get-free-coins-for-coin-master_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/minecraft-servers-that-allow-hacks_GM479516143.pdf
    • http://biblioteca.ganexa.edu.pa/repository/roblox-free-items-2021_GM431946152.pdf
    • http://biblioteca.ganexa.edu.pa/repository/easy-robux-today_GM431946152.pdf
    • http://biblioteca.ganexa.edu.pa/repository/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-link-2021_GM406889139.pdf
    • http://biblioteca.ganexa.edu.pa/repository/free-account-roblox-with-robux_GM431946152.pdf
    • http://biblioteca.ganexa.edu.pa/repository/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003033.bin
3c86abb56caaf652ad34911c066f34c7f820cf180e617bda17ae35ff9a9c69fd
pdf-font-stream PDF embedded font (sfnt) at offset 0x3033 22872 bytes
font_01_sfnt_off000063a9.bin
09331f1d479b06632facb78648812f66193fe8c97927eaaaed4247988ab7ba01
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A9 19628 bytes