Malicious PDF — malware analysis report

Static analysis result for SHA-256 1633659a3af12382…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 09:50:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4be42709ebb3214d84e29cd795378988 SHA-1: d838fbec5a6033c82baee9fa4110f916a3c6b32d SHA-256: 1633659a3af12382fc6da4575f8b81cb7582f6fc68e66d33dee95124a37ca443
142 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links and a document body that mimics content related to popular games and services, suggesting a lure for users to click on malicious links. The heuristic findings indicate a link farm and a password archive lure, strongly suggesting the document is designed to redirect users to potentially malicious websites for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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 http://netcdn.tw/app/431946152/i-got-hacked-on-roblox-game-hack
    • http://gts.edu.gh/library/repository/how-to-change-your-skin-in-roblox-for-free_GM431946152.pdf
    • http://gts.edu.gh/library/repository/websites-that-give-you-free-robux_GM431946152.pdf
    • http://gts.edu.gh/library/repository/coin-master-apk-hack-358_GM406889139.pdf
    • http://gts.edu.gh/library/repository/how-to-hack-through-walls-in-jailbreak-roblox_GM431946152.pdf
    • http://gts.edu.gh/library/repository/free-roblox-promo-codes-september-2021_GM431946152.pdf
    • http://gts.edu.gh/library/repository/how-to-hack-roblox-accounts-passwords_GM431946152.pdf
    • http://gts.edu.gh/library/repository/get-real-free-robux_GM431946152.pdf
    • http://gts.edu.gh/library/repository/pokemon-go-no-free-remote-raid-pass_GM1094591345.pdf
    • http://gts.edu.gh/library/repository/how-do-you-earn-robux-for-free_GM431946152.pdf
    • http://gts.edu.gh/library/repository/coin-master-codes_GM406889139.pdf
    • http://gts.edu.gh/library/repository/how-do-i-get-robux_GM431946152.pdf
    • http://gts.edu.gh/library/repository/how-to-get-8-robux-free_GM431946152.pdf
    • http://gts.edu.gh/library/repository/coin-master-free-spins-link-march-2021_GM406889139.pdf
    • http://gts.edu.gh/library/repository/roblox-hack-without-human-verification-or-survey_GM431946152.pdf
    • http://gts.edu.gh/library/repository/good-games-to-hack-on-roblox_GM431946152.pdf
    • http://gts.edu.gh/library/repository/minecraft-hacked-client-112-2_GM479516143.pdf
    • http://gts.edu.gh/library/repository/raindrop-hack-roblox_GM431946152.pdf
    • http://gts.edu.gh/library/repository/minecraft-education-free_GM479516143.pdf
    • http://gts.edu.gh/library/repository/minecraft-windows-10-hacks_GM479516143.pdf
    • http://gts.edu.gh/library/repository/every-free-item-in-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f8f.bin
0a3bff95fb5434c5f4bb73c1bf85509a23d0a4e001694ededcb33964536c2182		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F8F 22964 bytes
font_01_sfnt_off00006334.bin
6c2b446f688e7c6971afa99b6f8a58d3210ca0f8d5c3bc14108407e13c24aeba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6334 18748 bytes

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