Malicious PDF — malware analysis report

Static analysis result for SHA-256 dee264d51153709f…

MALICIOUS

PDF

34.9 KB Created: 2021-07-09 16:30:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b85f0e2a341fc7cbe09e89ddde7eb3ad SHA-1: c7f526e5acdd908f523cab582f824d957e597c1d SHA-256: dee264d51153709f040593e6d78e00b419d7757e7481366ff946531f4690b24f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and embedded URL heuristics strongly indicate malicious intent. The document body, though partially obfuscated, contains URLs related to game hacks and free items, suggesting a lure to download a malicious payload. The presence of multiple PDF-related heuristics further supports this. No scripts were extracted, but the overall pattern is consistent with a phishing document designed to trick users into downloading malware.

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.tw/app/406889139/free-spins-and-coins-coin-master-game-hack
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-free-shirts-to-put-up-for-sale_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-hack-version_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-roblox-birthday-printable_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/rbxcity-free-robux-instant_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/hack-roblox-users_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-skins-boy-free_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/se-puede-hackear-coin-master_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-to-become-a-hacker-in-roblox_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-printable-minecraft-coloring-pages_GM479516143.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-card-collection-in-coin-master_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-abonns-hack_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/roblox-cheat-engine-hack-2021_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-hack-apk_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-spins-coin-master-2021-glitch_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/coin-master-heaven-links_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/sb-game-hacker-coin-master_GM406889139.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/cheat-engine-roblox-tycoon-2021_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/how-do-you-hack-to-get-robux_GM431946152.pdf
    • http://www.woundcare4heroes.org.uk/uploads/files/files/free-bobux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003228.bin
710f37ddc458b797e9f2aa625dde9744ee5f3d0e9a99b43bd2bb5933b4514ab9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3228 22932 bytes
font_01_sfnt_off0000656e.bin
e3514f5c13c59f74fe131b320bb4a7a21799b0fccf5b53c141d50f68870e844d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x656E 18348 bytes

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