Malicious PDF — malware analysis report

Static analysis result for SHA-256 2477f5c2a490fe35…

MALICIOUS

PDF

32.2 KB Created: 2021-07-19 12:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f2c28aee871c044cfc4d46a30d1da3e1 SHA-1: 4d27cfc862a1870b29883c58840da9fe983f662f SHA-256: 2477f5c2a490fe350c918deab7c65876f03e9599f5c9c33e5a694c33fb2b0b3f
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs, some pointing to IP addresses, that are designed to lure users into downloading game-related cheats or currency. The ML classifier strongly indicated maliciousness, and the presence of external URIs and a download button lure suggest an attempt to deliver a secondary payload. No scripts were extracted, but the overall structure and content point to a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

Heuristics 4

  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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/479516143/minecraft-hack-mod-game-hack
    • http://110.164.163.187/ckfinder/userfiles/files/rbx-gg-free-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/how-to-get-free-robux-on-ipad_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/minecraft-hacked-client-112-2_GM479516143.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-free-spins-2021_GM406889139.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/games-that-give-you-free-robux_GM431946152.pdf
    • http://110.164.163.187/ckfinder/userfiles/files/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002972.bin
ff7a2cffc119ef5a80c86047f41a12b29c9ac4f22cccad12855ee9c0aaca80f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2972 22892 bytes
font_01_sfnt_off00005ced.bin
c98163390533840513273057c02ab8b0002c23ddfc36b9b9583c7d176bc18763		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5CED 18056 bytes

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