Malicious PDF — malware analysis report

Static analysis result for SHA-256 efb8bc8fa70f500a…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 04:44:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 24c39eb39b54a636da747257a722fbf4 SHA-1: e82c78b3728b1fa2f8cda411667c3183065c65e4 SHA-256: efb8bc8fa70f500a2dcfc295344929dffba49154674e0a6667994f11fb139483
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The document contains numerous embedded URLs and a primary external URI pointing to game hacks and cheats, indicating a lure for users to download potentially malicious files. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that this is a phishing or malware distribution attempt. The presence of a download button lure and callback lure heuristics further reinforces the malicious intent.

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/todos-los-hacks-de-roblox-game-hack
    • http://elib-s2.ubl.ac.id/repository/roblox-robux-hacks-no-verification_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/free-rich-roblox-accounts-2021-may-with-bc_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/heroes-online-roblox-free_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-2021-robux-no-survey_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/free-roblox-games-by-admin_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/robux-hack-2021_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/power-simulator-roblox-hack_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/how-to-hack-accounts-on-roblox-on-ipad_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/how-to-get-the-free-purple-headphones-on-roblox_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/only-working-way-to-get-free-robux-in-roblox_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/get-free-robux-no-inspect_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/free-robux-2021_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/roblox-lumber-tycoon-2-cheats-xbox-one_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/free-robux-no-verification-on-laptop_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/roblox-cbro-cheats_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/f3x-hack-roblox_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/spiderman-roblox-free_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/roblox-hack-injector-dl_GM431946152.pdf
    • http://elib-s2.ubl.ac.id/repository/how-to-get-a-free-bag-in-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002e96.bin
07b78ccf72038bcc9f94503c7e9ad0d6b8fe3b687b5b8758f0703072c5646aa0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E96 22072 bytes
font_01_sfnt_off00005fb5.bin
6709c7dcdde2051ce35da47a422647fc6b011535264bfb9fd07ffbc01a881ecf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 19000 bytes

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