Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdafa1bdba1b77fb…

MALICIOUS

PDF

34.3 KB Created: 2021-07-09 19:25:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3217d3a85e7d34deda53325d285ec540 SHA-1: 358912b9d347045763f5f7b6202a4c26a5339093 SHA-256: cdafa1bdba1b77fb64b7da7e084ebc38da1c675d837c6075b9385c39da80d00b
62 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs and a visible call-to-action button, all pointing towards lures for obtaining free in-game currency or items for popular games like Coin Master and Roblox. The ML classifier strongly flagged this PDF as malicious, and the presence of clickable URIs, including one pointing to a raw IP address, reinforces the likelihood of a phishing or malware distribution attempt. No scripts were extracted from this sample.

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/how-to-earn-free-spin-in-coin-master-game-hack
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-hack-roblox-to-get-infinite-robux_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-gift-card-10-25-50-roblox_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-hack-roblox-accounts-for-robux_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/minecraft-free-version-pc_GM479516143.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-download-minecraft-java-edition-for-free_GM479516143.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-accounts-for-sale-free_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/coin-master-fun-free-spins_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/robloxfun-com-generator_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-robux-com-roblox_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/actual-free-robux_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-spins-coin-master-daily_GM406889139.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-earn-robux-by-playing-games_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/2021-free-promo-codes-robloxyoutube_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/free-robux-no-verification_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-get-free-robux-easy-on-roblox_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-plaza-hack_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/10-know-this-give-free-robux-secret_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/roblox-hcbb-hack_GM431946152.pdf
    • http://1.179.208.67/ckfinder/userfiles/files/how-to-hack-srf-15a-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031e9.bin
ff25e9c3127802e85a79febe2bae06fd5ed8c510248e69840f36ad64e493e5d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x31E9 22288 bytes
font_01_sfnt_off00006368.bin
e175444d8625d5933ae29808464a0db72f90ee30ef4af4272c37160f9cf9ff60
pdf-font-stream PDF embedded font (sfnt) at offset 0x6368 18336 bytes