Malicious PDF — malware analysis report

Static analysis result for SHA-256 4047110d493f9f99…

MALICIOUS

PDF

41.6 KB Created: 2021-05-12 14:03:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 8f6a414afe37ffd330379e0abe74ae3d SHA-1: 42a1bb6d5b1dd601e3681c3db934aad132b68b60 SHA-256: 4047110d493f9f994d2437fc85d1df65c039e0bd7362a7e2a38b9ef1cc701990
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure and numerous embedded links to scam websites offering 'free Robux' or 'Coin Master hacks'. The heuristic firings indicate a mass external PDF link farm and a high ML classifier score, strongly suggesting malicious intent. The primary goal appears to be directing users to malicious sites through deceptive means.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-scam-game-hack
    • http://www.travelone.ae/userfiles/files/rbx-gg-free-robux_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/cmaster-club-coin-master-hack_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-hack-apk-app_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/free-robux-that-actually-works-2021_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/free-spins-for-coin-master-app_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/how-to-hack-coin-master-spin_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/easy-how-to-get-free-robux_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/free-coin-master-cards-link_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/how-to-get-robux-for-free-2021_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/free-robux-com-no-verification_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-hack-online-generator_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/robux-com-free_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-links-app_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/free-robux-hack-2021_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/roblox-hack-download-pc_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/coin-master-free-spins-link-whatsapp-group_GM406889139.pdf
    • http://www.travelone.ae/userfiles/files/free-robux-glitch_GM431946152.pdf
    • http://www.travelone.ae/userfiles/files/feb-23-2021-free-coin-master-spins_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004786.bin
5b502fed46b7b7daa6813b79b369e8f92249971e96051618b3173cc2a550fcf2
pdf-font-stream PDF embedded font (sfnt) at offset 0x4786 24476 bytes
font_01_sfnt_off00007f85.bin
24c52a02bd601b0a5cf869202747d5c16280e540771a7d3b3f68f33a5cbf68e3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F85 18500 bytes