Malicious PDF — malware analysis report

Static analysis result for SHA-256 229527f7e44e68db…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 05:45:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a5776e80a01d90b7689ccfe33e21dcd0 SHA-1: c4e96ebf1127234a1c630e81025a5b7a9f69516f SHA-256: 229527f7e44e68db70a818ec97911deb62331062e032d60f933d86d73f7f2224
82 Risk Score

Malware Insights

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

The PDF document contains heuristics indicating it is malicious and attempts to trick the user into installing a browser extension or update. It also contains a prominent external URI pointing to a suspicious domain, likely serving as a lure for malicious content. The document body, though partially corrupted, suggests a theme of 'free views' or 'game hacks', aligning with common social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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/free-tiktok-views-trial-game-hack PDF link annotation
    • https://www.kaojen.com.tw/upload/files/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/is-minecraft-free-on-xbox_GM479516143.pdfIn PDF document text
    • https://www.kaojen.com.tw/upload/files/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003107.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3107 26852 bytes
SHA-256: 4c1dbb55b439238e211c76bf4ea0035c8f49d44381a45272a289f426c9e4c02d
font_01_sfnt_off00006d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D7B 18056 bytes
SHA-256: e0f5149f099f9bf1ac81ae109a6f3e331ce3f0e28429fffdc236381c75b9df70

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