Malicious PDF — malware analysis report

Static analysis result for SHA-256 14782e8dab96b773…

MALICIOUS

PDF

43.0 KB Created: 2021-05-16 10:06:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: c1865f3ad504a9471b60210c2663063b SHA-1: d39108da34931320fd8609468b6189891e10e172 SHA-256: 14782e8dab96b7733e77f6da7b55400cebcee843a561f9fafe2ac0115c572899
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a link farm, embedding numerous URLs that point to other PDF files, likely for SEO manipulation or to host malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a 'download button' heuristic further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites or download further payloads.

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/431946152/free-robux-images-game-hack
    • http://shootawayproduction.com/images/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdf
    • http://shootawayproduction.com/images/websites-to-get-free-robux_GM431946152.pdf
    • http://shootawayproduction.com/images/how-to-get-free-robux-easy-2021_GM431946152.pdf
    • http://shootawayproduction.com/images/robux-place-rewards_GM431946152.pdf
    • http://shootawayproduction.com/images/boku-no-roblox-hack_GM431946152.pdf
    • http://shootawayproduction.com/images/coin-master-332-apk-free-download_GM406889139.pdf
    • http://shootawayproduction.com/images/free-robux_GM431946152.pdf
    • http://shootawayproduction.com/images/hack-coin-master-1_GM406889139.pdf
    • http://shootawayproduction.com/images/free-robux-without-downloading-anything_GM431946152.pdf
    • http://shootawayproduction.com/images/how-to-hack-to-get-robux_GM431946152.pdf
    • http://shootawayproduction.com/images/coin-master-daily-free-spins-and-coins_GM406889139.pdf
    • http://shootawayproduction.com/images/clean-master-free-coins-and-spins_GM406889139.pdf
    • http://shootawayproduction.com/images/coin-master-game-hack-online_GM406889139.pdf
    • http://shootawayproduction.com/images/free-robux-com-no-verification_GM431946152.pdf
    • http://shootawayproduction.com/images/free-robux-websites-that-actually-work_GM431946152.pdf
    • http://shootawayproduction.com/images/free-spins-on-coin-master-app_GM406889139.pdf
    • http://shootawayproduction.com/images/free-robux-app-2021_GM431946152.pdf
    • http://shootawayproduction.com/images/free-coins--spins-coin-master_GM406889139.pdf
    • http://shootawayproduction.com/images/coin-master-online-hack-no-survey-no-password_GM406889139.pdf
    • http://shootawayproduction.com/images/best-free-spin-app-for-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000493c.bin
731a734ef42ea35c2befd4d483997ec9b028e27f2538b46960658969b59f7d3f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493C 25980 bytes
font_01_sfnt_off00008418.bin
a2580c58451f3b1d88c8ceab1016c43f7244c9e681afad5968b7c22bbe0132ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 18792 bytes

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