Malicious PDF — malware analysis report

Static analysis result for SHA-256 c272572dcf0572c6…

MALICIOUS

PDF

45.1 KB Created: 2021-06-07 18:10:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: eb046673fd2111966e36e30b9f3819b7 SHA-1: 8b7b9176fc84bbf4bc652cc91e509cda98dcb62d SHA-256: c272572dcf0572c66c6ed86fb2c7b1090c744549bb225a87949820bcca54e50d
102 Risk Score

Malware Insights

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

This PDF contains a large number of external links, many of which are SEO-optimized and point to pages offering 'free Robux' or game hacks. The document body and heuristics indicate a lure to click these links, likely for phishing or to download further malicious content. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/free-robux-hack-just-username-game-hack
    • http://modlingua.com/images/free-robux-no-human-verification-and-no-survey_GM431946152.pdf
    • http://modlingua.com/images/free-robux-hack-no-verification_GM431946152.pdf
    • http://modlingua.com/images/free-free-robux_GM431946152.pdf
    • http://modlingua.com/images/free-whatsapp-tik-tok-status-download_GM835599320.pdf
    • http://modlingua.com/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdf
    • http://modlingua.com/images/coin-master-mod-version-free-download_GM406889139.pdf
    • http://modlingua.com/images/how-to-change-your-username-on-roblox-for-free-2021_GM431946152.pdf
    • http://modlingua.com/images/coin-master-free-spins-link-2021-iphone_GM406889139.pdf
    • http://modlingua.com/images/minecraft-pc-download-free-full-version_GM479516143.pdf
    • http://modlingua.com/images/roblox-free-executor_GM431946152.pdf
    • http://modlingua.com/images/how-to-download-minecraft-for-free-on-android_GM479516143.pdf
    • http://modlingua.com/images/roblox-unlimited-robux-apk-free-download_GM431946152.pdf
    • http://modlingua.com/images/working-coin-master-hack_GM406889139.pdf
    • http://modlingua.com/images/coin-master-hack-mod_GM406889139.pdf
    • http://modlingua.com/images/roblox-elemental-battlegrounds-hack-script_GM431946152.pdf
    • http://modlingua.com/images/free-robux-on-phone_GM431946152.pdf
    • http://modlingua.com/images/free-axe-in-roblox_GM431946152.pdf
    • http://modlingua.com/images/how-to-get-free-followers-on-roblox_GM431946152.pdf
    • http://modlingua.com/images/how-to-get-free-skins-on-coin-master_GM406889139.pdf
    • http://modlingua.com/images/how-to-hack-roblox-pepol-haeds-of_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000514d.bin
73d39b7d515cb2339f6f3bc6349287a30af32fb3da0b65210d413b515546ac11
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x514D 25080 bytes
font_01_sfnt_off00008b74.bin
1de172c398db628d6e5c66992ee29e7714ed910d85c5b23f5cb1c246ab5d624a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8B74 19128 bytes