Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f657ea144a318e…

MALICIOUS

PDF

35.0 KB Created: 2021-06-27 18:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 7e5ec92b31841495a7c3236224d35e46 SHA-1: d2e6325f3198cdd2da9607bc4a141e45ed447a95 SHA-256: a3f657ea144a318e990cbc21816d7062d9bd73127c1b95a8d80187cfeb9cda65
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains multiple embedded URLs and text related to game hacks and cheats, strongly suggesting a lure for users to download malicious content or visit phishing sites. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were explicitly extracted, the presence of embedded URLs and the overall theme points towards a phishing or malware distribution 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-hack-roblox-jailbreak-beginner-game-hack
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/descargar-coin-master-hack_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-free-mask_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-cheat-dll-2021_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-free-robux-on-roblox-2021-pc_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-no-verification-2021-android_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/install-coin-master_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-get-your-roblox-account-back-from-being-hacked_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/hack-coin-master-ios-download_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/minecraft-windows-10-free-code_GM479516143.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/free-robux-pastebin_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spin-link-new_GM406889139.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/www-rbx-com_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/robloxheroxyz-free-robux_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/guess-that-song-game-roblox-cheats_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/beyond-roblox-speed-hacks_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/roblox-case-clicker-cheat_GM431946152.pdf
    • http://www.kpud-gianyarkab.go.id/new/public/ckfinder/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031ea.bin
8e957e2f8df641e28122ec82d698f2b53b8e505a81c4038aeb19118650acdd3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x31EA 22368 bytes
font_01_sfnt_off0000638f.bin
27e9f7bd52ac8ec08eec422abe6a29509bce315342b76598215783669bea53bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x638F 19104 bytes

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