Malicious PDF — malware analysis report

Static analysis result for SHA-256 d60e0ca74ec91e3f…

MALICIOUS

PDF

46.5 KB Created: 2021-06-11 09:05:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 96f70ab69d26ba89fe269c72f4d56f39 SHA-1: ac1dcb4bdba195a063ef0fd84ee20bfc42f99e50 SHA-256: d60e0ca74ec91e3f53ca0af4d4fd0a2629d077b206ff560ff6121e767507f8f6
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a significant number of external links, many pointing to IP addresses, which is indicative of a link farm designed to host various scam or malware-related documents. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the structure and numerous embedded URLs suggest a malicious intent to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

Heuristics 5

  • 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.
  • 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 https://netcdn.tw/app/431946152/free-avatar-games-roblox-game-hack
    • http://118.174.0.244/UserFiles/File/free-robux-no-human-verify_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-links-free-spins_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/hack-coin-master-spin_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-without-doing-anything_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-free-spin-link-new_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-mod-free-download_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-gift-card-codes-2021_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-hack_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-minecraft-account-and-password-generator_GM479516143.pdf
    • http://118.174.0.244/UserFiles/File/links-to-get-free-spins-on-coin-master_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-modded-minecraft-server-hosting_GM479516143.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-giveaway-live_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-free-spins-hack_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-free-spins-2021_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/daily-free-spins-coin-master_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/collect-free-spins-coin-master_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-roblox-clothes-2021_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/how-to-setup-a-minecraft-server-for-free_GM479516143.pdf
    • http://118.174.0.244/UserFiles/File/robux-free-gift-card_GM431946152.pdf
    • http://wolfzscripts
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ea7.bin
b34815b9925f89233923938aea3c19b161555de04795e328ddb090b017379386		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA7 25372 bytes
font_01_sfnt_off000087d3.bin
77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D3 2832 bytes
font_02_sfnt_off00009184.bin
abf6fc4b04cdf293d9d02e10d3244a2eecb62c7ca142a54a66efa4d1f0933230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9184 18652 bytes

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