Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccde01e34d9e833…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 11:49:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2c2df8d97c7f9bf4bbf1b687919e1187 SHA-1: 532fecc33c870a24358b90253da95ae7571b5339 SHA-256: 3ccde01e34d9e8336fae4b13be8e179f01ceb1263efdd22b54385fcab52a4d02
102 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are related to game cheats and hacks, suggesting a lure for users to download potentially malicious content. The ML classifier also flagged this PDF as malicious with high confidence. The presence of a download button heuristic further supports the malicious intent.

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/cheat-tembus-roblox-jailbreak-2021-game-hack PDF link annotation
    • https://ambasador.md/ckfinder/userfiles/files/how-to-change-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/robux-hack-app_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-hack-in-jailbreak-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/roblox-hax_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/free-robux_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-hack-someone-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/hackear-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/mistplay-robux_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/coin-master-hack-version-ios_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/hire-a-hacker-for-roblox_GM431946152.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/daily-coin-master_GM406889139.pdfIn PDF document text
    • https://ambasador.md/ckfinder/userfiles/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002ec5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC5 21892 bytes
SHA-256: ddb9d380636a49b5f9956375b2423697566b49597902dd3ad5e3ad9c47b95a7b
font_01_sfnt_off00005f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F28 20012 bytes
SHA-256: 40a2606f874ba54a2939045f934caf388048860eb95685da9ee036820b130f7e

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