Malicious PDF — malware analysis report

Static analysis result for SHA-256 18ad7ba2276a7910…

MALICIOUS

PDF

34.6 KB Created: 2021-07-21 03:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 97e44bb45d3d75a01e12f8c905f2f67f SHA-1: bf22d31e27e78cb28abac3cfb9e08f9365c3793b SHA-256: 18ad7ba2276a791090c5a76be9ddc6d3ef9c40b742cf0447112b2115a578a7f2
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple URLs pointing to sites offering game-related cheats and hacks, suggesting a lure for users seeking such content. The presence of a download button lure and the ML classifier's high confidence score indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it may lead to a download or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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/daily-free-spins-for-coin-master-game-hack
    • http://nema.go.ke/images/minecraft-account-hacked_GM479516143.pdf
    • http://nema.go.ke/images/free-tiktok-accounts_GM835599320.pdf
    • http://nema.go.ke/images/freer-pro-tiktok_GM835599320.pdf
    • http://nema.go.ke/images/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://nema.go.ke/images/codes-to-get-free-robux_GM431946152.pdf
    • http://nema.go.ke/images/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://nema.go.ke/images/free-spin-link-for-coin-master-game_GM406889139.pdf
    • http://nema.go.ke/images/how-to-get-minecraft-bedrock-for-free_GM479516143.pdf
    • http://nema.go.ke/images/claim-free-spins-coin-master_GM406889139.pdf
    • http://nema.go.ke/images/free-robux-codes-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002ee8.bin
581e8e6ae941d9a293ab82a318fd5a496d16f8e34f55ea6d1d09f42dabc03485		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EE8 23840 bytes
font_01_sfnt_off0000652d.bin
b750d5a8b44caccc122b2ff8294eb9307e18e87e3916697a2a7f0c063c77f291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x652D 18308 bytes

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