Malicious PDF — malware analysis report

Static analysis result for SHA-256 2153403255d18a32…

MALICIOUS

PDF

34.4 KB Created: 2021-06-23 10:35:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 787c335a7ccccbf526937c311973a56a SHA-1: 59c8e284d1a0ba888563700c9e6acc5b5c220309 SHA-256: 2153403255d18a32c49a2b713b86403d8b145966f185e2a6a4fd84a42d1e827e
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs that form a link farm, likely intended to direct users to malicious download sites. The document body and heuristic firings indicate a lure related to free game items or currency, such as for Roblox or Coin Master. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or scam attempt.

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/free-download-games-roblox-game-hack
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-roblox-hacking-website_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-fast-2021_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/coin-master-links-for-free-spins_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/coin-master-computer-hack_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-hack_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/was-minecraft-ever-free_GM479516143.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-robux-fast_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-money-links-coin-master_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/roblox-get-eaten-hack_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-apps_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/latest-coin-master-free-spins-link_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/how-to-get-a-thousand-robux-for-free_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-robux-codes-not-used-yet_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/coin-master-hack-2021-ios_GM406889139.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-robux-android_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/2021-free-robux_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/free-robux-no-verification-2021-ios_GM431946152.pdf
    • https://www.pendaftarantransvision.com/ckfinder/userfiles/files/hack-coin-master-download-ios_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000307e.bin
42f38bd7ab958c0b58a068b96f4e3d81f4a1743d8d1aecf9926d850b39f9b23a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x307E 21764 bytes
font_01_sfnt_off00006023.bin
c6c2b94de4561ee3070c4c30f9d1f38ca426c4d6102f88c570fdabe7cbcbe810		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6023 19416 bytes

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