Malicious PDF — malware analysis report

Static analysis result for SHA-256 11099aa0ca71af26…

MALICIOUS

PDF

42.5 KB Created: 2021-05-17 10:31:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1abfa39ec8eb707fec2b498030fe278c SHA-1: ad3d7bbd3bb60f620e4289d84099e24d2cc9d4f1 SHA-256: 11099aa0ca71af2600297ed58f2abc77857b476295a5ae6d68464f6b7557c7ab
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, identified as a link farm, directing users to pages offering free in-game currency and hacks. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs suggests a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a likely attempt to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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 https://netcdn.xyz/app/406889139/coin-master-free-spins-promo-code-game-hack
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-fast_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/minecraft-bedrock-edition-hacks_GM479516143.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-online-hack-download_GM406889139.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-promo-codes-for-robux_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/2021-free-spins-coin-master_GM406889139.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-gold-cards-free-2021_GM406889139.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/bloxpink-free-robux_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-to-get-free-robux-easy-on-phone_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/how-to-get-free-coins-in-minecraft_GM479516143.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/minecraft-for-free-on-phone_GM479516143.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-spins-for-coin-master-game_GM406889139.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-roblox-card_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-robux-apps-that-work_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/real-free-robux-codes_GM431946152.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/client-minecraft_GM479516143.pdf
    • http://www.lorengntt.com/new/public/ckfinder/userfiles/files/roblox-free-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a4e.bin
9d223ee8238601d5fc748bd9a1efbbf8aa980c88b9b6bf03e32d19a7d6f5c813		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A4E 25204 bytes
font_01_sfnt_off00008337.bin
dc3ef91c42b56b19e880a129857b9cc4209ff723fc15082788877c1745c42c0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8337 18476 bytes

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