Malicious PDF — malware analysis report

Static analysis result for SHA-256 4edf4d081b77c631…

MALICIOUS

PDF

36.6 KB Created: 2021-07-09 02:08:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 54eb65489a21a3fb8b0a1bcd80f90cde SHA-1: b726e6d40d5b58c35ce2c62f07b5a41611abdd5e SHA-256: 4edf4d081b77c6310601dc3ede3b7e7d9e167f701ef9dd66480e20e40d9d4bb1
62 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs and a document body that explicitly mentions free spins and links for games like Coin Master and Roblox. The presence of external URIs and a URI pointing to a raw IP address suggests these links are intended to redirect users to malicious sites. The ML classifier also flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/406889139/coin-master-daily-free-spins-link-today-facebook-game-hack
    • http://36.94.36.7/elib/repository/hacked-msg-for-roblox_GM431946152.pdf
    • http://36.94.36.7/elib//repository/password-free-roblox-accounts_GM431946152.pdf
    • http://36.94.36.7/elib/repository/how-to-get-free-robux-2021-no-verification-no-scam_GM431946152.pdf
    • http://36.94.36.7/elib/repository/roblox-website-robux_GM431946152.pdf
    • http://36.94.36.7/elib/repository/free-robux-car-codes_GM431946152.pdf
    • http://36.94.36.7/elib/repository/free-robux-no-generator_GM431946152.pdf
    • http://36.94.36.7/elib/repository/robux-script-hack-2021_GM431946152.pdf
    • http://36.94.36.7/elib//repository/free-spins-and-coins-coin-master-2021-link_GM406889139.pdf
    • http://36.94.36.7/elib//repository/coin-master-hack-apk-download_GM406889139.pdf
    • http://36.94.36.7/elib//repository/free-robux-codes-no-human-verification_GM431946152.pdf
    • http://36.94.36.7/elib/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdf
    • http://36.94.36.7/elib/repository/wie-kann-man-ihn-roblox-hacken-um-robaks_GM431946152.pdf
    • http://36.94.36.7/elib/repository/coin-master-free-spins-link-no-verification_GM406889139.pdf
    • http://36.94.36.7/elib/repository/free-tiktok-followers_GM835599320.pdf
    • http://36.94.36.7/elib/repository/how-to-get-unlimited-robux_GM431946152.pdf
    • http://36.94.36.7/elib/repository/minecraft-pe-016-0-apk-download-free_GM479516143.pdf
    • http://36.94.36.7/elib//repository/daily-free-spins-for-coin-master_GM406889139.pdf
    • http://36.94.36.7/elib//repository/free-robux-microsoft_GM431946152.pdf
    • http://36.94.36.7/elib/repository/coin-master-free-spins-link-2021_GM406889139.pdf
    • http://36.94.36.7/elib//repository/free-robux-without-verification-2021_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000350b.bin
ca2f4e449c927068757dc91c57871ce05fd4eecae799da4f22295211d2516b06
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x350B 23392 bytes
font_01_sfnt_off00006a02.bin
10262a12b6a93a5eb401f2bda0e6b10a20895a2a64ebc159cb68bc6fd556a7cf
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A02 19100 bytes