Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac3657b6f8b91545…

MALICIOUS

PDF

42.3 KB Created: 2021-06-13 21:45:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5c4b81b490b4c1e7be9308b93edf5669 SHA-1: 2e5be02e528186e00c821295856c737706a5f28a SHA-256: ac3657b6f8b915459e2a9138a47c6858dcd7c445c0a4eccb70e82b8d435bdf55
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains numerous URLs related to game cheats and in-game currency, suggesting a lure for users to download potentially malicious files. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent. Although no scripts were explicitly extracted, the document's structure and content strongly suggest it's designed to trick users into downloading malware.

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.co/app/431946152/hack-de-roblox-para-robux-game-hack
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/crap-my-roblox-account-just-got-hacked_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/comment-avoir-un-wall-hack-roblox_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/undetectable-cheat-engine-roblox_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-russian-flag-roblox-t-shirt_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/como-obtener-robux-usando-cheat-engine-66_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-robux-2021-no-verification_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/roblox-hack-me-robux_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-robux-come_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/hacks-for-minecraft-windows-10_GM479516143.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-coins-on-coin-master_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-robux-penut_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/gun-script-hack-roblox-pastebin_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/coin-master-free-spins-link_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/nuevos-hacks-de-roblox-2021_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/free-robux-hacks-no-verification_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/coin-master-free-spins-link-today-instagram_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/coin-master-spin-free_GM406889139.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-roblox-accounts-on-phone-2021_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/robux-hack-free-robux_GM431946152.pdf
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-booga-booga-script-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004a42.bin
5825d39789d611f98efb74706f9e89726902f52d3852e6c1134bd630d786c373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4A42 24496 bytes
font_01_sfnt_off000081b4.bin
daa20f66f0262db4f11c2a46e080696888d5e3e616f92aad94a421210ee60395		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B4 18644 bytes

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