Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a80b5ec35635dbd…

MALICIOUS

PDF

41.8 KB Created: 2021-05-20 00:37:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 889574768d3ab156d25975864170b405 SHA-1: f999076a09b53be09d9158e48c41dce819bd7170 SHA-256: 7a80b5ec35635dbdfc12440fbce203ad33c4941c638c2cf61886ee71d3c4f16e
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is designed to lure users into installing a browser extension or plugin, likely to facilitate credential theft or malware installation. It also contains an external URI pointing to a suspicious URL, which may serve as a download source for malicious content. No scripts were extracted from this sample, but the combination of the browser install lure and embedded URLs strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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 https://netcdn.xyz/app/835599320/tiktok-free-real-fans-game-hack
    • http://www.gyfunnews.com/ckfinder/userfiles/files/is-java-minecraft-free_GM479516143.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-free-spins-may-11-2021_GM406889139.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/is-minecraft-free-on-computer_GM479516143.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/minecraft-building-hacks_GM479516143.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-to-free-robux_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/minecraft-free-download-apk-softonic_GM479516143.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-executor-free-download_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/op-rewards-free-robux_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-robux-no-survey_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-robux-codes-no-verification-2021_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/robux-app_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/best-free-robux-sites_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-pics_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-hack-xyz-download_GM406889139.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-adopt-me-hack_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-robux-human-verification_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/roblox-promo-codes-2021-robux_GM431946152.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/free-spins-coin-master-legit_GM406889139.pdf
    • http://www.gyfunnews.com/ckfinder/userfiles/files/coin-master-free-spins-hack-iphone_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000045c9.bin
e031585396d18e78a6b81edfd9d305b43ba9daecfa61d299c6f965fd33b5eeac
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45C9 26904 bytes
font_01_sfnt_off000082c8.bin
cb450a0a4d0e2191a37d5cc567df0cce1a2c5d692e7ea641c0d0c05f648bc015
pdf-font-stream PDF embedded font (sfnt) at offset 0x82C8 17756 bytes