Malicious PDF — malware analysis report

Static analysis result for SHA-256 f94678a1dda009d5…

MALICIOUS

PDF

34.9 KB Created: 2021-06-27 10:43:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b9609a522302ebf8c8d31a2bae386199 SHA-1: 5b1085e5844935f23dedcb5989093853547498fa SHA-256: f94678a1dda009d5d0cb1839e128d828cb5209fb4e33347139f6cf1c3d2384ce
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The document contains embedded URLs and a call-to-action lure, suggesting it is designed to trick users into downloading further content. The ML classifier strongly flagged this PDF as malicious, and the presence of multiple URLs related to game hacks and free virtual currency reinforces a phishing or scamming intent. No scripts were extracted from this sample.

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-get-free-robux-why-bc-game-hack
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-without-human-verification-real_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/free-roblox-toy-codes_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-hack-free-spins_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/minecraft-free-no-download_GM479516143.pdf
    • http://www.6636.com.tw/ad6636/upload/files/hack-coin-master-game-apk_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/roblox-earn_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/how-can-i-get-free-robux_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-link-spin_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/hack-script-roblox-tuto_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-free-stars_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/how-to-hack-roblox-with-cheat-engine-prison-life_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/how-to-hack-roblox-accounts-on-phone_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/roblox-gift-card-online-free_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/roblox-hack-injector-2021_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/roblox-adopt-me-hack-mascotas_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-100-spin-slot_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/try-minecraft-free_GM479516143.pdf
    • http://www.6636.com.tw/ad6636/upload/files/coin-master-spin-free_GM406889139.pdf
    • http://www.6636.com.tw/ad6636/upload/files/free-robux-app-verification_GM431946152.pdf
    • http://www.6636.com.tw/ad6636/upload/files/contrasenas-de-cuentas-de-roblox-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300d.bin
d074126054973502877b16913fc690bd970a0fe1440c3334b5112417b4554d7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x300D 22460 bytes
font_01_sfnt_off00006211.bin
8ee18cfe02d35cabb99042e75d79a166d419791530842fa5b86ba085194651f9
pdf-font-stream PDF embedded font (sfnt) at offset 0x6211 19528 bytes