Malicious PDF — malware analysis report

Static analysis result for SHA-256 295dea9b5e042ae9…

MALICIOUS

PDF

43.7 KB Created: 2021-05-19 14:37:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 36615c4465ea322c1fb61a10468a7cc2 SHA-1: bcfde9df36054f3c543fa283a393da8f3ee1e1a0 SHA-256: 295dea9b5e042ae99b7e795dea6341df0a0298010db30cf5ad1012c0b1783a0b
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, many of which point to scam-related content like 'free robux' or 'coin master hacks'. The presence of a fake CAPTCHA heuristic indicates a user interaction lure designed to trick the user into clicking these malicious links. The document's content and structure strongly suggest it is part of a phishing or scam campaign.

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/how-to-scam-on-roblox-game-hack
    • http://columbuscigar.com/images/free-robux-for-kids-no-verification_GM431946152.pdf
    • http://columbuscigar.com/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://columbuscigar.com/images/how-to-get-free-roebucks-without-verification_GM431946152.pdf
    • http://columbuscigar.com/images/apk-coin-master-hack_GM406889139.pdf
    • http://columbuscigar.com/images/coin-master-free-spins-link-today_GM406889139.pdf
    • http://columbuscigar.com/images/free-spins-link-in-coin-master-2021_GM406889139.pdf
    • http://columbuscigar.com/images/free-spins-coin-master-links_GM406889139.pdf
    • http://columbuscigar.com/images/coin-master-free-link-facebook_GM406889139.pdf
    • http://columbuscigar.com/images/how-to-win-free-robux_GM431946152.pdf
    • http://columbuscigar.com/images/coin-master-spin-link_GM406889139.pdf
    • http://columbuscigar.com/images/coin-master-free-spins-link-blogspot_GM406889139.pdf
    • http://columbuscigar.com/images/roblox-com-free-robux_GM431946152.pdf
    • http://columbuscigar.com/images/coin-master-spins-hack-2021_GM406889139.pdf
    • http://columbuscigar.com/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdf
    • http://columbuscigar.com/images/coin-master-hacks-free-spins_GM406889139.pdf
    • http://columbuscigar.com/images/websites-that-give-free-robux_GM431946152.pdf
    • http://columbuscigar.com/images/free-robux-only-username-no-human-verification_GM431946152.pdf
    • http://columbuscigar.com/images/hacks-para-coin-master_GM406889139.pdf
    • http://columbuscigar.com/images/coin-master-hack-to-get-free-spins_GM406889139.pdf
    • http://columbuscigar.com/images/how-to-get-free-robux-with-no-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000047ec.bin
17017dc94558c8b3a5cf2d87fcb8b5156cbeed7abf5755879f88ccab29090812		 pdf-font-stream PDF embedded font (sfnt) at offset 0x47EC 28016 bytes
font_01_sfnt_off000087f6.bin
34f93b6f39f5197ad83579d8861054fdfd3ef28e5805cfd87bb9002912825c3f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87F6 18436 bytes

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