Malicious PDF — malware analysis report

Static analysis result for SHA-256 e922cc61ddb7f663…

MALICIOUS

PDF

34.6 KB Created: 2021-07-08 00:20:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 6e8a20bfa2eb871735d0aee6bbd295e2 SHA-1: a98cd99a6b21331d3162b74ac1fd58f4e183355f SHA-256: e922cc61ddb7f663af3ed4a486edd3ea346b654ce5b2695c73f0366e28db5220
62 Risk Score

Malware Insights

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

The PDF contains multiple embedded URIs pointing to external resources, many of which are hosted on an IP address and offer game-related cheats or downloads. The ML classifier strongly flagged this PDF as malicious, and the presence of download-related lures reinforces the malicious intent. The primary goal appears to be tricking users into downloading further malicious content disguised as game hacks or freebies.

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-free-link-2021-game-hack
    • http://217.165.206.12/userfiles/files/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/roblox-hack-ga_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/how-to-download-roblox-for-free_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/get-free-robux-now_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-robux-apk_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-tiktok-likes-app_GM835599320.pdf
    • http://217.165.206.12/userfiles/files/coin-master-deals_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/roblox-free-group-uniform_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/ways-to-get-free-robux-2021_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/microsoft-rewards-roblox_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/roblox-how-to-hack-any-tycoon_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-robux-games_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/how-to-get-free-robux-no-scamcom_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/free-tiktok-likes-no-human-verification_GM835599320.pdf
    • http://217.165.206.12/userfiles/files/free-spins-coin-master-without-survey_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/free-minecraft-texture-packs_GM479516143.pdf
    • http://217.165.206.12/userfiles/files/how-to-make-a-roblox-dominus-for-free_GM431946152.pdf
    • http://217.165.206.12/userfiles/files/coin-master-free-coins_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/mangocheats-com-hack-coin-master-cheat_GM406889139.pdf
    • http://217.165.206.12/userfiles/files/coinmasterdailyfreespins-com_GM406889139.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00002f5d.bin
d22aa933fb1a450ea13fce243cac19d51786b41775d789845a527b277050c51c
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2F5D 23124 bytes
font_01_sfnt_off000063a2.bin
5c6f2b8c8950227f34c0c7c762a0319831c5dcbb819f0110f1dbfe9ff8d1e338
pdf-font-stream PDF embedded font (sfnt) at offset 0x63A2 18568 bytes