Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bd80c9a907d27f4…

MALICIOUS

PDF

36.0 KB Created: 2021-07-09 05:36:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: a5ca2fbb903de89e8d5d054275867d09 SHA-1: 6c298eb4b0188afbc5f34f6a3096f6413910a432 SHA-256: 1bd80c9a907d27f4c9d87e395ccb46f1d4dc62f6c89c3fe6989cf9c2c70828c5
102 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or malware distribution lure, specifically targeting users interested in game-related hacks and free in-game currency. The document contains a mass of external links, many of which are SEO-optimized PDF documents, and a direct URL to a file hosted on netcdn.tw. The presence of a 'download button' heuristic further supports the interpretation that the document is designed to trick users into downloading further malicious content.

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.tw/app/431946152/games-on-roblox-that-give-you-free-robux-game-hack
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/game-guardian-roblox-invisible-hack_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/coinmaster-blogspot_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/roblox-company-tycoon-hack_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/how-to-hack-coin-master-ios-no-jailbreak_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/coin-master-free-spins-link-june-2021_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/como-tener-mas-dinero-en-adopt-me-roblox-con-hacks_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/how-to-host-a-minecraft-server-for-free_GM479516143.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/is-minecraft-vr-free_GM479516143.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/how-do-i-get-robux-for-free-but-i_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/free-robux-pin-codes_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/coin-master-spin-ml_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/coin-master-gold-cards-free_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/roblox-hack-free-unlimited-robux-and-tickets_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/free-robux-hack-generator-no-human-verification-2021_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/roblox-cheating-hacking_GM431946152.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/coin-master-free-spins-1-coin-master_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/coin-master-hack-mod-apk-2021-download_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/coin-master-32-android-mod-hack-apk-download_GM406889139.pdf
    • https://elearning.misalifadah.com/__statics/gudangsoal/files/slurp-ink-roblox-hack_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000033ac.bin
25afeb86f917ece5c06517b01699d9241dd4dbba81294e79f0025798338be3c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x33AC 22524 bytes
font_01_sfnt_off000065e5.bin
3217d2b45e6aba390097db31ed4f489c97a69b2175e2ab7441deb7edbbce2f2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E5 19716 bytes

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