Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb8745616ae14b4b…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 23:51:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3ee3cc2d6ee1551cbff161bde78f4de8 SHA-1: 7c60fd08d64505b465e01cad092da1d4e2b034e7 SHA-256: fb8745616ae14b4b6043657bb0720936c645575a75d323531653c508c4923aa0
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 document body that explicitly advertises "hacks" and "free items" for popular games. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests an attempt to redirect the user to download further malicious content. No scripts were extracted, but the overall pattern indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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-create-gui-roblox-hack-game-hack
    • http://www.riverkennet.org/uploads/files/files/free-coins-coin-master-hack_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/free-coin-master-spins_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/descargar-coin-master-hackeado_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/free-roblox-accounts-with-bc_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/secret-free-roblox-hats-2021_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/minecraft-complete-handbook_GM479516143.pdf
    • http://www.riverkennet.org/uploads/files/files/coin-master-free-spins-android_GM406889139.pdf
    • http://www.riverkennet.org/uploads/files/files/hack-de-robux-100-real-no-fake_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/roblox-hacker-vs-pro_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/robux-free-com_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/robux-hack-free-robux_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/download-roblox-free-on-the-apple-store_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/free-minecraft-skin-maker_GM479516143.pdf
    • http://www.riverkennet.org/uploads/files/files/best-free-clothing-for-roblox-war-group_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/how-to-get-free-hoodie-in-roblox_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/free-account-giveaway-roblox_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/how-to-get-java-minecraft-for-free_GM479516143.pdf
    • http://www.riverkennet.org/uploads/files/files/how-to-hack-sword-fight-on-the-heights-on-roblox_GM431946152.pdf
    • http://www.riverkennet.org/uploads/files/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003089.bin
e0d24ec8db88ecb35a58378b9617c298020496693cfc0242003c89086643564a
pdf-font-stream PDF embedded font (sfnt) at offset 0x3089 23180 bytes
font_01_sfnt_off000064b7.bin
6bfaa1ff180d96e47dddba8383ffe916a057563f938f5840e684d9bf76a4eff9
pdf-font-stream PDF embedded font (sfnt) at offset 0x64B7 19184 bytes