Malicious PDF — malware analysis report

Static analysis result for SHA-256 f292dd89b0e58f1c…

MALICIOUS

PDF

36.0 KB Created: 2021-06-18 08:26:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 82fba183f1fc3b858bad1e343827e131 SHA-1: 7062d47893873e1f87f6ecc0373fe60840e71b2e SHA-256: f292dd89b0e58f1c2cdbfe5f5e965dfb5d18bbd0fd77d777fb0ed944ebbb0b9a
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are presented as download pages for game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic further supports this. The document body, though partially corrupted, contains references to game hacks and URLs, reinforcing the lure-based attack pattern. No scripts were extracted from this sample.

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.co/app/431946152/roblox-prison-life-v2.0-infinite-ammo-hack-2021-game-hack
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-free-link-daily_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/tiktok-free-view-iphone-5c_GM835599320.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-hack-apk-download_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-daily-free-spins-2021_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-hack-tool-v1-9-download-free_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/easy-way-to-get-robux_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/microsoft-free-robux_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-free-spins_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-without-verifications_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-free-online-play-now_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/how-can-you-get-free-robux_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/coin-master-daily_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/todays-free-spin-and-coin-links_GM406889139.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/free-tiktok-followers_GM835599320.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/roblox-free-no-download_GM431946152.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/minecraft-online-free-no-download_GM479516143.pdf
    • https://infopromotransvision.com/ckfinder/userfiles/files/links-to-get-free-coins-in-coin-master_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000034aa.bin
0083cb495a8429860c8da134bc564b2c3d2e876fb620fc114b99376775316164		 pdf-font-stream PDF embedded font (sfnt) at offset 0x34AA 22060 bytes
font_01_sfnt_off00006594.bin
e675ab345bcca91da509534165e000e4c03d8ef5f0bcd862c4cd439f4c0685df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 19712 bytes

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