Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ecbd1569dca278a…

MALICIOUS

PDF

42.9 KB Created: 2021-05-16 19:58:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 3bfe34e865efe7d7d0af65aa5a3e1df0 SHA-1: afda8d65757130c75d8b166ce7d0521e9f534fcd SHA-256: 2ecbd1569dca278a99f4fe3bc1ed57f594f99d98cfbd038f5b598b84caa7573f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which are SEO-farmed and point to websites offering game cheats or hacks. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest a phishing or scam campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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-cards-game-hack
    • http://niceviaapia.com.br/images/ckfinder/files/ways-to-get-free-robux_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/blox-supply-free-robux_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-mcpe-master-coins_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/clean-master-free-coins-and-spins_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-survival-free_GM479516143.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-hack-someones-roblox-account-2021_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-glitch_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-apk-download-2021_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-free-spins-daily-link-game-mod_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/minecraft-free-download_GM479516143.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/free-robux-generator-com-roblox-hack_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-buy-robux-for-free_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hacks-no-surveys_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-speed-hack_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/easy-ways-to-get-free-robux_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/coin-master-hack-version-ios_GM406889139.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/roblox-april-fools-hack_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/robuxy-com-generator_GM431946152.pdf
    • http://niceviaapia.com.br/images/ckfinder/files/how-to-get-free-robux-without-human-verification_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004a80.bin
1fe886d842cada0461d995a543519293421c39747907396be2251e700d0aaf2e
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A80 26168 bytes
font_01_sfnt_off000086c9.bin
e3dc30cd69473f08b9483bb660e9aeaccc8f6f74c3e4f353697525059d592d8d
pdf-font-stream PDF embedded font (sfnt) at offset 0x86C9 17720 bytes