Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bd929096a3d2a33…

MALICIOUS

PDF

45.1 KB Created: 2021-06-06 23:26:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5d3827fd0df2915f8c9319381b4ff44a SHA-1: ac7a556ad1b9ba49b2b1da023eb95dbac03d586b SHA-256: 2bd929096a3d2a33e35ed39ecfb95af37479732c8dd3d3e2f631876ddc63f77b
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which are SEO-optimized and point to resources related to game hacks and free currency. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. The primary attack pattern involves tricking users into clicking these links, likely leading to malware downloads or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/roblox-hack-week-2021-game-hack
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-no-human-verification_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-hack-coin-master-with-game-guardian_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-promo-code-to-get-free-robux_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-jailbreak-hack_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-coins-coin-master-no-human-verification_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/spins-for-coin-master_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-spins-on-coin-master-link_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-spins-coin-master-no-verification_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/master-free-spin-and-coin-link_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-spins-coin-master-links-blogspot_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/microsoft-bing-robux_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/get-me-robux-for-free_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-2021-spin-link-today_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-real-working_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-ios-2021_GM406889139.pdf
    • http://digilib.ulm.ac.id/pusat/repository/roblox-free-robux-hack_GM431946152.pdf
    • http://digilib.ulm.ac.id/pusat/repository/flame-gg-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000050a1.bin
4368bce84f50d1645a3eaf7b1edfc430396842749c58c3db785646499de8c454		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50A1 26256 bytes
font_01_sfnt_off00008bf4.bin
35008a7caa896074f2437b6c2bab257e3ebfb1167615460cffa766b42bc2f67f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8BF4 18784 bytes

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