Malicious PDF — malware analysis report

Static analysis result for SHA-256 674fb7c23c5acb1b…

MALICIOUS

PDF

227.0 KB Created: 2021-07-05 07:06:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 87aead7729d571473ae1fc0606870c22 SHA-1: a6798b75b9acdd3d59c544bdcecdabd04c847a5a SHA-256: 674fb7c23c5acb1b028c086b42798a56723fd1b9b264d69db06e1adb7f56fb16
132 Risk Score

Malware Insights

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

The document presents a fake CAPTCHA and a call-to-action button, attempting to trick the user into installing a malicious browser extension or update. The embedded URLs suggest a lure for game-related hacks or cheats, which is a common social engineering tactic. No scripts were extracted, limiting the analysis of direct execution or payload delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0118

Heuristics 6

  • 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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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 http://netcdn.tw/app/1094591345/pokemon-go-for-free-download-game-hack
    • http://slim.sisminkada.net/repository/hacking-a-roblox-fans_GM431946152.pdf
    • http://slim.sisminkada.net/repository/coin-master-hack-spin-generator_GM406889139.pdf
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-by-just-watching-a-video_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-without-hacking-or-human-verification_GM431946152.pdf
    • http://slim.sisminkada.net/repository/free-roblox-app_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-to-hack-joining-sumones-server-roblox_GM431946152.pdf
    • http://slim.sisminkada.net/repository/free-robux-hack-no-games_GM431946152.pdf
    • http://slim.sisminkada.net/repository/skin-for-roblox-girl-free_GM431946152.pdf
    • http://slim.sisminkada.net/repository/free-coins-and-spins-coin-master_GM406889139.pdf
    • http://slim.sisminkada.net/repository/free-spin-link-coin-master_GM406889139.pdf
    • http://slim.sisminkada.net/repository/coin-master-free-daily-spins-2021_GM406889139.pdf
    • http://slim.sisminkada.net/repository/free-rainbow-stuff-you-can-get-on-roblox_GM431946152.pdf
    • http://slim.sisminkada.net/repository/downlos-roblox-free_GM431946152.pdf
    • http://slim.sisminkada.net/repository/free-spins-coin-master-blogspot_GM406889139.pdf
    • http://slim.sisminkada.net/repository/free-robux-pastebin-no-wait-2021-may_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-to-free-robux-no-human-verification_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-do-you-get-free-roblox_GM431946152.pdf
    • http://slim.sisminkada.net/repository/hack-the-plaza-beta-on-roblox_GM431946152.pdf
    • http://slim.sisminkada.net/repository/how-many-levels-are-there-in-coin-master_GM406889139.pdf
    • http://slim.sisminkada.net/repository/free-roblox-girl-clothes_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_023_off00031fb0.bin
b4c53df2d8ff16520de1a25e13e541b05aa3f0bd9f123e7988f23f873d0472e7		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31FB0 25576 bytes
font_01_sfnt_off00035bb1.bin
35d0aac4b688ba2d3778bce521545e603087c53921ee31f4c9e30c8222ed3ae0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x35BB1 18940 bytes

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