Malicious PDF — malware analysis report

Static analysis result for SHA-256 f44e34589f8c86e6…

MALICIOUS

PDF

46.0 KB Created: 2021-06-07 17:32:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 75327003814fb64ffe40e2c9d8067579 SHA-1: 35b9be7aebfe4c5e90d9409b141f9c5f98c46a84 SHA-256: f44e34589f8c86e6a3bc146b161845ec14bf6162476558d10e6a2b37a788b4eb
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document presents itself as a fake CAPTCHA or verification prompt to trick the user into interacting with it. It contains multiple embedded URLs, including one pointing to a potential malware download site. The presence of these lures and external links suggests the document is designed to facilitate initial access and potentially download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • 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.tw/app/431946152/destruction-simulator-roblox-hack-game-hack
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-coins-link-2021_GM406889139.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-free-executor_GM431946152.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-get-free-tiktok-followers_GM835599320.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/get-free-spins-in-coin-master_GM406889139.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-minecraft-hacks_GM479516143.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-bling-bling-card-coin-master_GM406889139.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-robux-legit_GM431946152.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-mod-apk_GM406889139.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/minecraft-free-android_GM479516143.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/robux-com-free-robux_GM431946152.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/master-coin-hack-game_GM406889139.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-hack-apk-download-latest-version_GM406889139.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/minecraft-font-free_GM479516143.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/how-to-minecraft-for-free_GM479516143.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-robux-codes-no-verification_GM431946152.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/robuxy-com-free-robux_GM431946152.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/free-views-on-tiktok_GM835599320.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/roblox-hacks-2021_GM431946152.pdf
    • http://www.agasrestaurant.com/uploaded_files/userfiles/files/coin-master-cracked-apk-free-download_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005576.bin
56b15e87b4ef356d836d7f1af01f802ebea2445839b36211e103157ed4453255		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5576 26280 bytes
font_01_sfnt_off00008f19.bin
726c389cf0096fd638c89ad9a3b56561f0e1539c80cf5fab83d5d3dc9ff641c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F19 18972 bytes

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