Malicious PDF — malware analysis report

Static analysis result for SHA-256 7320dff3bd74d343…

MALICIOUS

PDF

40.7 KB Created: 2021-05-19 23:53:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2a79b7b4e1fd340ed35599463cbf624a SHA-1: 5873ef0154011fedae6a40e99bce641652b6f6c3 SHA-256: 7320dff3bd74d3434a59d7cd081aafbbbc438473e59720347d4e2b41a2975638
122 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to PDFs hosted on the IP address 118.174.0.244, suggesting a link farm designed to attract users through SEO. The document body and extracted URLs indicate a lure related to game cheats and hacks, such as Coin Master and Roblox. The presence of a "download button" heuristic further supports the intent to trick users into downloading potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/406889139/coin-master-deals-game-hack
    • http://118.174.0.244/UserFiles/File/how-do-you-get-roblox-money_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/pubg-uc-no-human-verification_GM1330123889.pdf
    • http://118.174.0.244/UserFiles/File/free-spins-coin-master-march-2021_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/instagram-free-coin-master-spins_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/how-to-hack-peoples-roblox-accounts_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-games-that-actually-work_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-free-daily-spins-today_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/getrobux-now_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-for-free_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/hack-version-coin-master-apk_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/how-to-get-free-unlimited-robux_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-daily-spins-and-coins_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-hacks-no-surveys_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-legit_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/free-robux-no-anti-bot-verification_GM431946152.pdf
    • http://118.174.0.244/UserFiles/File/coin-master-free-coins-and-spins-daily_GM406889139.pdf
    • http://118.174.0.244/UserFiles/File/what-tiktok-free-will_GM835599320.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004819.bin
1912c72bed060b747113ab234d71b1e5550bc4a9a8b1e5bef516bfa7bee7bbcd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4819 23864 bytes
font_01_sfnt_off00007e0a.bin
52c0fe64debebcf63c3c815c6c64d77fa31e78daa170c20eab686a20850f8240		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0A 17788 bytes

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