Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bd19de908dbc433…

MALICIOUS

PDF

34.4 KB Created: 2021-06-18 04:50:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d9f0ad90daa5fb219739408fb9750e99 SHA-1: ff2f3e72adba7f7a16e4db440be9654e9fcc40be SHA-256: 9bd19de908dbc43382399d18248c6aa8309c58e3afc583611646d2133f603c55
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to pages offering free in-game currency or items for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, and the ML classifier strongly suggests maliciousness. The document body and embedded links suggest a lure to download or access potentially unwanted or malicious content.

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/free-dominus-in-roblox-game-hack
    • http://mansatupati.my.id/__statics/gudangsoal/files/get-roblox-for-free_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/robloxmatchcom-free-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-spins-coin-master-generator_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/hack-coin-master-free-spins_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-spins-coin-master-links_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-coins-for-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/free-coin-master-spin-generator_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coinmaster-fan-page_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-free-shield-link_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/robux-sites_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-time-hack-2021_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/minecraft-tower-defense-2-hacked_GM479516143.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/coin-master-hack-unlimited-spins-game-download_GM406889139.pdf
    • http://mansatupati.my.id/__statics/gudangsoal/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003011.bin
e86312057a765d29566a89099f2e0fbc3d7f852a7b03be683cbf48bac546cc2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3011 21992 bytes
font_01_sfnt_off00006091.bin
10479b8abe865067a3b9ace696777e07b04768b0bc0c7246407e15364a2384fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6091 19340 bytes

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