Malicious PDF — malware analysis report

Static analysis result for SHA-256 59cfb93f575bdb5d…

MALICIOUS

PDF

35.7 KB Created: 2021-07-08 21:28:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 1ba3d2cdcd438e107c464074d434f298 SHA-1: c93ef6f6d77c965dc23cd156015291be64cdc4fc SHA-256: 59cfb93f575bdb5d863b2c0d1e60e93be992744e1f52bc5e60d1a21959d268ee
102 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 promotes free Robux and game hacks. The PDF_SEO_LINK_FARM heuristic indicates a large number of external links, and the ML_NYX_PDF_MALICIOUS classifier strongly suggests malicious intent. The primary goal appears to be directing users to potentially malicious websites via the provided URLs.

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/431946152/how-to-get-free-robux-website-game-hack
    • http://www.alajwakh.com/uploaded_files/userfiles/files/best-free-fps-games-on-roblox_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-tiktok-followers-no-human-verification_GM835599320.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/daily-free-spins-coin-master-2021_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-daily_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-spins-on-coin-master-links-2021_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/1x1x1x1-roblox-hacker_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/hack-exploit-roblox-2021_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/coin-master-free-spins-2021-blogspot_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/hack-roblox-system48-free_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/tuto-roblox-get-free-robux-no-fake_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/exploit-cheat-in-roblox-2021_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-hack-roblox-for-robux_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/best-site-for-free-coin-master_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/robloxcom-free-kkk-k-k-k-k-m-k_GM431946152.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/hack-coin-master-apk-32_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/haktuts-coin-master-free-daily-spins_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/what-is-coin-master-app_GM406889139.pdf
    • http://www.alajwakh.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030d2.bin
4cb4de28e4b0898cd146213ec524753c6b23193bac6169c233b7c646f4b71bcc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x30D2 23712 bytes
font_01_sfnt_off000065b0.bin
c93debd830b422eae21ec10a608c2d09d6fed7207bb4c45cee900aa0b721bbbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 19304 bytes

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