Malicious PDF — malware analysis report

Static analysis result for SHA-256 17711871c51796b7…

MALICIOUS

PDF

34.1 KB Created: 2021-07-04 11:57:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f8eafb9986e76e6cf1aa36cec1fdff47 SHA-1: 5e93f4b76dab5309b5a3d6fc6a7ba65e55ab6c7e SHA-256: 17711871c51796b77cc1b251f79cdd2146a424b6c98af86f48b6a8c876d1121e
102 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to sites offering game hacks, free in-game currency, or exploit-related content. One prominent link directs to 'netcdn.tw/app/479516143/toolbox-apk-game-hack', suggesting a lure for downloading potentially malicious applications. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/479516143/toolbox-apk-game-hack
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-get-free-robux-in-roblox-2021-may_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/is-roblox-free-on-pc_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-hack-roblox-accounts-on-ipad-2021_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/roblox-jailbreak-games-for-free_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/minecraft-hacker-mask_GM479516143.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-hack-roblox-on-android_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-free-spins-ios_GM406889139.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/free-robux-without-offers_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/coin-master-free-coins_GM406889139.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/growtrooperz-free-robux_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/free-money-links-coin-master_GM406889139.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/exploit-hack-roblox-free-download_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/synapse-roblox-free-download_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-get-free-robux-on-roblox-2021-khaos_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/how-to-hack-builderman-on-roblox-2021_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/hack-coin-master-android_GM406889139.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/bleus-free-robux_GM431946152.pdf
    • http://www.rigor.co.mz/uploaded_files/userfiles/files/reddit-coin-master-hack_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030b2.bin
80f53c02b26c022375e40e2413f7377b1f8a96f3b030743595556c50bf7730aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30B2 22196 bytes
font_01_sfnt_off000061b1.bin
361581f8306467de26404d684280e66c6ed8dab4fc4e0354e81d22fde4170e45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61B1 18564 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.