Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a9b62c7d8ac3321…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 04:39:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: b95ee46adcf913f03688bc13c9603055 SHA-1: 926a9e5be720beae9faedfcc01e41194dd6f2568 SHA-256: 1a9b62c7d8ac3321db7b51ff876df36d6cbf6d717d4c509e4e38f78961c3f00e
142 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external websites, suggesting a link farm or SEO manipulation tactic. The 'SE_CLICKFIX' heuristic indicates the document may instruct users to execute commands, a common social engineering technique to bypass security measures. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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/479516143/minecraft-cheats-switch-game-hack
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/static-moonactive-net-free-spins-coin-master_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/minecraft-java-server-hosting-free_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/how-can-i-play-minecraft-for-free_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/archery-master-3d-coins-hack_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-daily-free-spins_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-daily-spins-and-coins_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-daily-free-spins-and-coins-link_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/robux-websites-that-work_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-link-blogspot_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/picture-roblox_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/roblox-script-hacks_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/get-free-robux-gg_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/free-robux-com-roblox_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/coin-master-hack-2021-no-survey_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/daily-spin_GM406889139.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/hey-google-how-do-you-get-free-robux_GM431946152.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/aristois-minecraft-hack_GM479516143.pdf
    • http://www.weworkkuwait.com/uploaded_files/userfiles/files/mc-update_GM479516143.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b5d.bin
593a7cee30f17e26403b4028b1925f8a82e50368290100c776b7b87bc6014f0f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5D 24960 bytes
font_01_sfnt_off0000846e.bin
0fc04686b0373a30d4a255cfcec4508d7ed03b66db0ab497f509a50ecb5e1dbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x846E 17896 bytes

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