Malicious PDF — malware analysis report

Static analysis result for SHA-256 a48ef9954e99882b…

MALICIOUS

PDF

33.3 KB Created: 2021-07-19 17:21:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ee3b43ceb004713012540787d6686076 SHA-1: 7611e8b5bced06f0dd85d151aeb39da621122637 SHA-256: a48ef9954e99882b8713522c9a1821a037f3cb99fcd8bfa54ba14088e634afca
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document body and extracted URLs indicate a lure for 'free Robux' or game-related cheats, a common phishing tactic. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests an attempt to redirect the user to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/431946152/get-free-robux-no-human-verification-game-hack
    • http://www.vista-design.hr/files/minecraft-multiplayer-free_GM479516143.pdf
    • https://www.vista-design.hr/files/how-to-get-free-minecraft-skins_GM479516143.pdf
    • http://www.vista-design.hr/files/is-minecraft-free-on-nintendo-switch_GM479516143.pdf
    • https://www.vista-design.hr/files/get-free-tiktok-followers_GM835599320.pdf
    • http://www.vista-design.hr/files/free-robux-roblox-promo-codes_GM431946152.pdf
    • http://www.vista-design.hr/files/coin-master-free-spins-app_GM406889139.pdf
    • http://www.vista-design.hr/files/free-minecraft-alt-accounts_GM479516143.pdf
    • https://www.vista-design.hr/files/tiktok-fans-free_GM835599320.pdf
    • http://www.vista-design.hr/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdf
    • https://www.vista-design.hr/files/minecraft-hacks-wurst_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b95.bin
b05aca2cf861d1036bf73f31a9e7092c56f223d8b7f8d82c757f8d2b2b6c8465		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B95 22564 bytes
font_01_sfnt_off00005db1.bin
38fd224e0d48f9f4e428ac61794e14445b5b8d4d7f08215596fa31319312d533		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DB1 19044 bytes

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