Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b7e87637d85485…

MALICIOUS

PDF

34.3 KB Created: 2021-06-26 13:06:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 4451723ba18680588f6af35d81e7fa70 SHA-1: 90dde2a8aede52568e57e201eedddcef1739b880 SHA-256: 31b7e87637d85485b9a0b4b93ac93a0c6c4ce29e1c90c77ae05ca86f023eb6f9
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded URLs and a document body that promotes 'free Robux' and game hacks, indicating a phishing or scam lure. The heuristic 'PDF_SEO_LINK_FARM' and the ML classifier strongly suggest malicious intent. The document likely serves as a lure to drive users to download malicious content or visit further scam pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-code-no-verification-game-hack
    • http://digilibfisip.unla.ac.id/repository/online-hacking-tricks-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-coin-master-game-without-verification_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/free-robux-apk_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-without-verification-ios_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-hack-app-android_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/minecraft-free-download-windows_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/how-to-get-stuff-for-free-on-roblox-catalog_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/ultimate-driving-hack-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/get-everything-free-on-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/roblox-coding-classes-free_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/hack-sex-roblox_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/como-hackear-roblox-robux-2021_GM431946152.pdf
    • http://digilibfisip.unla.ac.id/repository/coin-master-spin-link-free_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-coin-and-spin-for-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/free-bedrock-minecraft_GM479516143.pdf
    • http://digilibfisip.unla.ac.id/repository/free-spin-link-of-coin-master_GM406889139.pdf
    • http://digilibfisip.unla.ac.id/repository/zephplayz-free-robux-easy_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f9e.bin
98198f4f8eb8c13f0fc1a242fef959ddc11d2104a9ce6d8352e54b9f9ee0fb0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F9E 22012 bytes
font_01_sfnt_off00006065.bin
849b1d6804edcd9a9ea86d9c70ce9963868ad734f68e664b7f2ae676718497ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6065 19248 bytes

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