Malicious PDF — malware analysis report

Static analysis result for SHA-256 3994a79a32722c30…

MALICIOUS

PDF

35.4 KB Created: 2021-07-20 12:05:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: dec542c36a296fc41a1ac1c5a84369ea SHA-1: 2456b83d498568ebf8e412c0cf0cbdcf7680b2e3 SHA-256: 3994a79a32722c309e693c08fce889703854d7763753310627b46cac8f4f7067
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a clear call-to-action to download a 'Coin Master Generator' from a suspicious URL. The presence of multiple embedded URLs and the ML classifier flagging the PDF as malicious strongly suggest a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely attempt to deliver a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-daily-free-spins-blogspot-game-hack
    • https://roberto-gac.com/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • https://roberto-gac.com/images/free-spins-for-coin-master-game_GM406889139.pdf
    • https://roberto-gac.com/images/coin-master-free-2021-spin-link_GM406889139.pdf
    • https://roberto-gac.com/images/free-tiktok-likes-app_GM835599320.pdf
    • https://roberto-gac.com/images/free-minecraft-resource-packs_GM479516143.pdf
    • https://roberto-gac.com/images/coin-master-free-soins_GM406889139.pdf
    • https://roberto-gac.com/images/minecraft-mods-download-free_GM479516143.pdf
    • https://roberto-gac.com/images/coin-master-hack-without-verification-2021_GM406889139.pdf
    • https://roberto-gac.com/images/free-robux-real_GM431946152.pdf
    • https://roberto-gac.com/images/free-minecraft-server-maker_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031de.bin
ede0e1c035877a927982bc0d1d2f7a29ee84752a3e32fb308d74f4115d7f5aae		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31DE 23480 bytes
font_01_sfnt_off00006700.bin
99efaab321cd8bd4771148dad361c5d136942e4fae15d22f58752892cb19a04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6700 18812 bytes

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