Malicious PDF — malware analysis report

Static analysis result for SHA-256 b240b5ac91f558bf…

MALICIOUS

PDF

35.2 KB Created: 2021-07-05 09:11:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 57cf3a14be23304b0f1e553b0e87cb46 SHA-1: 7f15ea24e6aa8acf41fb5fd64fb1240b3ce0b487 SHA-256: b240b5ac91f558bf3e42259d22bfb84569f60e1283d0a4d4270f865a809d7375
62 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 call-to-action phrase, strongly suggesting a phishing or malware distribution attempt. The ML classifier also flagged this PDF as malicious. The document body and extracted URLs indicate a lure for free in-game items, a common social engineering tactic to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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-2021-no-human-verification-game-hack
    • http://103.30.145.97/__statics/gudangsoal/files/roblox-cheat-engine-retail-tycoon-2021_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-link_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-get-2021-robux-for-free_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-hack-roblox-games_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-hack-reddit_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-pubg-uc_GM1330123889.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/twitter-coin-master-free-spins_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-free-spin-bonus_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/roblox-player-exe-free_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-roblox-account-generator_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/toolbox-for-mcpe_GM479516143.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/can-you-actually-get-free-robux_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-minecraft-capes_GM479516143.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-unlock-blocks-cheat-in-lucky-blocks-in-roblox_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-to-get-free-coins-in-coin-master-game_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-roblox-accounts-with-robux_GM431946152.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/coin-master-spin-hack-2021_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/free-appsfor-coin-master-daily-rewards_GM406889139.pdf
    • http://103.30.145.97/__statics/gudangsoal/files/how-do-i-get-free-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030a8.bin
598a8d9c2d6f85cdc5a395dbaba5d252e328a34aebb6435185730b9ae4f63f00
pdf-font-stream PDF embedded font (sfnt) at offset 0x30A8 22400 bytes
font_01_sfnt_off0000628c.bin
415a8643b263bdb8a5e4ae51f1e0119ae52f9187a77a7c28158d674e6dc65c25
pdf-font-stream PDF embedded font (sfnt) at offset 0x628C 19736 bytes