Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e7b7e5e5630a6c…

MALICIOUS

PDF

34.7 KB Created: 2021-06-18 23:59:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f3209d0dff49c37ffbf4b868b0eadacd SHA-1: c85a4835a5793b438c2001b18119077c51535fc0 SHA-256: 32e7b7e5e5630a6cd3b5fea5b969bc7c799a5c8a25c8bf99b293111e9f7de3e5
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links disguised as offers for free virtual currency and game items, a common lure for phishing and scam websites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to attract traffic. The ML classifier also flagged this PDF as malicious 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/how-to-get-free-robux-from-slingtv-game-hack
    • https://mtsn31jkt.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • https://mtsn31jkt.com/__statics/gudangsoal/files/free-group-roblox_GM431946152.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-spin-coin-master-iphone_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spin-codes_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/play-minecraft-online-free_GM479516143.pdf
    • https://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hack-safe_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-coin-master-spins-for-today_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-spins-hack-ios_GM406889139.pdf
    • https://mtsn31jkt.com/__statics/gudangsoal/files/avatar-de-roblox_GM431946152.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/moonactive-free-spins_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-kid-friendly-no-human-verification_GM431946152.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/60-free-spins-coin-master_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-spins-on-coin-master-game_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/free-robux-no-human-verify_GM431946152.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/get-free-cards-for-coin-master_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-free-coins-generator_GM406889139.pdf
    • https://mtsn31jkt.com/__statics/gudangsoal/files/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/link-for-free-spins-on-coin-master_GM406889139.pdf
    • http://mtsn31jkt.com/__statics/gudangsoal/files/coin-master-hack-tool-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031d1.bin
609772b6d2d3867aef4dce8bd2130ee78b766be203cc4ebf07e83dc2e982a10e
pdf-font-stream PDF embedded font (sfnt) at offset 0x31D1 21596 bytes
font_01_sfnt_off000060e9.bin
df36d5a16e42f0a790033e291acc94844a60f5b55a9696ee7d9b1a506a29cb54
pdf-font-stream PDF embedded font (sfnt) at offset 0x60E9 19552 bytes