Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e37f7292c6039ff…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 18:14:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: db129cf663f9df9637d732c21201f69b SHA-1: 44f47ec11db0082fdc8bfb452d62dc1d4fc1631d SHA-256: 7e37f7292c6039ff4b7f84cc6d10109084d09b070c2180757daa7b41092063c6
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into clicking malicious links, such as the one pointing to 'https://netcdn.xyz/app/431946152/free-robux-no-download-game-hack'. The document also hosts a large farm of SEO-optimized PDF links, indicating a potential phishing or malware distribution scheme. While no scripts were directly extracted, the PDF structure and embedded links suggest a client-side exploitation or download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-no-download-game-hack
    • http://bagliomangiapane.com/images/free-coin-master-spins-for-today_GM406889139.pdf
    • http://bagliomangiapane.com/images/how-to-make-a-free-server-in-minecraft-java_GM479516143.pdf
    • http://bagliomangiapane.com/images/free-robux-no-verify-2021_GM431946152.pdf
    • http://bagliomangiapane.com/images/free-spins-for-coin-master-without-human-verification_GM406889139.pdf
    • http://bagliomangiapane.com/images/how-to-play-roblox-for-free_GM431946152.pdf
    • http://bagliomangiapane.com/images/free-robux-gift-card_GM431946152.pdf
    • http://bagliomangiapane.com/images/google-play-coin-master-free-spins_GM406889139.pdf
    • http://bagliomangiapane.com/images/best-site-for-free-coin-master-free-spin-link_GM406889139.pdf
    • http://bagliomangiapane.com/images/coin-master-gift-link_GM406889139.pdf
    • http://bagliomangiapane.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://bagliomangiapane.com/images/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdf
    • http://bagliomangiapane.com/images/how-to-hack-to-get-robux_GM431946152.pdf
    • http://bagliomangiapane.com/images/how-to-get-free-robux-2021_GM431946152.pdf
    • http://bagliomangiapane.com/images/free-robux-without-downloading-anything_GM431946152.pdf
    • http://bagliomangiapane.com/images/minecraft-bedrock-server-hosting-free_GM479516143.pdf
    • http://bagliomangiapane.com/images/roblox-scam_GM431946152.pdf
    • http://bagliomangiapane.com/images/free-robux-without-doing-anything_GM431946152.pdf
    • http://bagliomangiapane.com/images/coin-master-free-spin-27_GM406889139.pdf
    • http://bagliomangiapane.com/images/robux-free-com_GM431946152.pdf
    • http://bagliomangiapane.com/images/facebook-coin-master-free-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b8b.bin
b6fc6e6904ad2b932603b58772ea126cfc136ec97097271741f586744d6de840		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B8B 25980 bytes
font_01_sfnt_off00008660.bin
a83584a15d83770571e134086905248a9fe783ccc3b424d06d308178a7ec7f42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8660 18824 bytes

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