Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c19ba08d1391de6…

MALICIOUS

PDF

33.0 KB Created: 2021-06-25 17:09:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: d603aa759cd80e8320d73768fcc16c18 SHA-1: ff49bbdf7f24b40845ba674cd9dcb0846b740fb0 SHA-256: 6c19ba08d1391de61612bc58a706c4a80ecb477a20fb208cd76dd32206af7c1e
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that lead to websites offering game cheats and virtual currency, indicating a lure for potentially unwanted or malicious downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a download button lure reinforces this assessment. While no scripts were extracted, the document's structure and content suggest it's designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/free-virtual-code-roblox-game-hack
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-2021-no-human-verification_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-fan-page-free-spins_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-codes_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/robloxfun-com-generator_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-hack-2021_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-infinity-heroes-roblox_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/robux-free-c_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/get-free-robux_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/cheat-roblox-mod-de-passe_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/5-roblox-games-that-give-free-items_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-websites-no-human-verification_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-hack-but-no-surveys_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-private-server-free_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-redeem-cards-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002b02.bin
5b44e99b31a90d68f6edb33a8f37d4166ecc2f6d5b2d316eddc3501c1842340d
pdf-font-stream PDF embedded font (sfnt) at offset 0x2B02 21980 bytes
font_01_sfnt_off00005b7a.bin
5390a17e563c9c00e70efe5330a7d2898b093f18c7ce6fc812378313160c704e
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B7A 19320 bytes