Malicious PDF — malware analysis report

Static analysis result for SHA-256 8889ec240e43269d…

MALICIOUS

PDF

34.6 KB Created: 2021-06-18 07:38:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9cf4d293ed1f2c8b66b7067db97064af SHA-1: 55ead1b988423da709c8ecfab0702b434071ba6e SHA-256: 8889ec240e43269d7375eaabc5950af2422615a4f03d3af5d0ccab5ba2771af1
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs and a link farm structure, strongly suggesting a malicious intent to redirect users to potentially harmful content. The document body and heuristics indicate a lure related to game cheats and free currency, likely to trick users into downloading further malware or visiting malicious sites. The ML classifier also flagged this PDF with high confidence.

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/roblox-free-play-unblocked-game-hack PDF link annotation
    • http://lesvossolidarity.org/images/roblox-hack-robux-and-tix-cheat-tool-youtube_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-do-you-earn-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lesvossolidarity.org/images/coin-master-free-spins-and-chips_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/zephplayz-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/is-it-possible-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-can-i-get-free-coinsn-coin-master_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/external-roblox-jailbreak-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • http://lesvossolidarity.org/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/roblox-speed-hack-v3rmillion_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/buxblast-com-robux-cheats_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/download-hack-roblox-cb-ro_GM431946152.pdfIn PDF document text
    • http://lesvossolidarity.org/images/coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003067.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3067 22012 bytes
SHA-256: fab168fb0c151e7655988350ee5f7bcfd0588d091078ddfe8c54c9220b938e22
font_01_sfnt_off00006141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6141 19328 bytes
SHA-256: 3f8fcfd6793173678d64da27b5556ddaaf9cc5a755c9b661f5d7ad87aadfcdc1

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