Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9be7dc9dea84b80…

MALICIOUS

PDF

34.1 KB Created: 2021-05-22 01:08:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f23a3813dac702954b24a70c94b470c1 SHA-1: d29285d04dbe8868cad587ca8b8834f596b29005 SHA-256: a9be7dc9dea84b80e2438aaa09ff6032472e9ec16db733f7e8801cd5ae35b402
82 Risk Score

Malware Insights

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

The PDF document contains lures for browser extension installation and download buttons, directing users to external URLs. The embedded URL 'https://netcdn.xyz/app/835599320/tiktok-followers-for-free-game-hack' is particularly suspicious and likely serves as a landing page for a malicious payload or phishing attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9505

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-followers-for-free-game-hack
    • https://www.devries-group.de/images/free-robux-gift-card_GM431946152.pdf
    • https://www.devries-group.de/images/free-roblox-hack-us_GM431946152.pdf
    • https://www.devries-group.de/images/roblox-account-taker_GM431946152.pdf
    • https://www.devries-group.de/images/arsenal-hacks-roblox_GM431946152.pdf
    • https://www.devries-group.de/images/coin-master-free-spin-realme-products_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f5b.bin
a2fcc70e679f20682c900943e1c00d41098344d5bc3699fc89790294dde71023		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F5B 23792 bytes
font_01_sfnt_off00006587.bin
1b1e1c30a9592b0fb91196253d93c27419259905b41c1e14a3654a7d7056ebb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6587 17692 bytes

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