Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26a1029bc7a0ea0…

MALICIOUS

PDF

45.1 KB Created: 2021-05-19 22:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b7c4f21de00bdb177c082e0e5f60275f SHA-1: 5cced86ae5dc07320e17e5998e1db48f6fbbca4c SHA-256: e26a1029bc7a0ea09171f83f10dde3d8c7f1007487f53aa3be006832b9fc0e75
142 Risk Score

Malware Insights

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

The PDF document contains a fake CAPTCHA lure to trick users into interacting with malicious links. It also hosts a large number of SEO-optimized PDF links, suggesting a link farm designed to distribute malware or phishing content. The primary URL identified is likely a distribution point for a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9621

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-please-game-hack
    • http://ims-77.fr/images/free-spins-on-coin-master-2021_GM406889139.pdf
    • http://ims-77.fr/images/free-coins-and-spins-for-coin-master-game_GM406889139.pdf
    • http://ims-77.fr/images/coin-master-daily-free-cards_GM406889139.pdf
    • http://ims-77.fr/images/coin-master-free-spins-link-2021-today_GM406889139.pdf
    • http://ims-77.fr/images/robux-free-promo-codes_GM431946152.pdf
    • http://ims-77.fr/images/how-to-make-roblox-clothes-for-free_GM431946152.pdf
    • http://ims-77.fr/images/how-do-we-get-free-robux_GM431946152.pdf
    • http://ims-77.fr/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://ims-77.fr/images/free-coins-coin-master-2021_GM406889139.pdf
    • http://ims-77.fr/images/daily-coin-master-free-link_GM406889139.pdf
    • http://ims-77.fr/images/free-daily-spins-coin-master-2021_GM406889139.pdf
    • http://ims-77.fr/images/do-coin-master-hacks-work_GM406889139.pdf
    • http://ims-77.fr/images/how-to-get-free-robux-codes_GM431946152.pdf
    • http://ims-77.fr/images/how-to-get-free-robux-without-verifying-2021_GM431946152.pdf
    • http://ims-77.fr/images/minecraft-wurst-hacked-client_GM479516143.pdf
    • http://ims-77.fr/images/coin-master-hack-pc-download_GM406889139.pdf
    • http://ims-77.fr/images/rbxcity-free-robux_GM431946152.pdf
    • http://ims-77.fr/images/more-robux_GM431946152.pdf
    • http://ims-77.fr/images/minecraft-tiktok-hacks_GM479516143.pdf
    • http://ims-77.fr/images/master-coin-free-spin_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000483e.bin
cf9e54ec028dcf69ace7e596048cb8804fe7bef03f90ad2a0b5c218e3e1d183a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x483E 25652 bytes
font_01_sfnt_off00008389.bin
e9630f3bb738ae3bc329a423cf069c8035d70ce2227e3557c42815f85ad3284f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8389 2852 bytes
font_02_sfnt_off00008d4b.bin
a4143b220e35e332e52efa777ecf598d1a164c1d6c5ab1887881bf2674d2e637
pdf-font-stream PDF embedded font (sfnt) at offset 0x8D4B 18472 bytes