Malicious PDF — malware analysis report

Static analysis result for SHA-256 b71cb85892533516…

MALICIOUS

PDF

35.0 KB Created: 2021-06-19 08:56:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: ebffa88e022f1e7a09cd7bae1f2b71f2 SHA-1: 9c06da655fe8114ededf90b262bfc1ed10b67f8c SHA-256: b71cb858925335162d7958972a9da07543bb2a07ee226daca1da57b7435b93d2
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-optimized and point to pages promising game hacks and free currency. The ML classifier strongly flagged this PDF as malicious, and the presence of numerous links suggests a link farm designed to distribute malware. The document body, though partially corrupted, contains references to 'Roblox Script Hack Download' and URLs that reinforce this theme.

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/roblox-script-hack-download-game-hack
    • http://lesvossolidarity.org/images/free-robux-generator_GM431946152.pdf
    • http://lesvossolidarity.org/images/how-to-get-free-robux-com_GM431946152.pdf
    • http://lesvossolidarity.org/images/robux-party-com-for-robux-free_GM431946152.pdf
    • http://lesvossolidarity.org/images/how-to-hack-and-get-free-robux_GM431946152.pdf
    • http://lesvossolidarity.org/images/how-do-u-use-cheat-engin-with-roblox_GM431946152.pdf
    • http://lesvossolidarity.org/images/free-robux-generator-no-human-verification_GM431946152.pdf
    • http://lesvossolidarity.org/images/roblox-games-that-give-you-free-robux_GM431946152.pdf
    • http://lesvossolidarity.org/images/coin-master-hack-lost-world-2021-com_GM406889139.pdf
    • http://lesvossolidarity.org/images/how-to-hack-roblox-for-robux-on-ipad_GM431946152.pdf
    • http://lesvossolidarity.org/images/roblox-hack-com_GM431946152.pdf
    • http://lesvossolidarity.org/images/how-to-hack-roblox-games-without-cheat-engine-2021_GM431946152.pdf
    • http://lesvossolidarity.org/images/how-50-robux-gift-card-free_GM431946152.pdf
    • http://lesvossolidarity.org/images/free-coin-master-stuff_GM406889139.pdf
    • http://lesvossolidarity.org/images/coin-master-key-free-spin_GM406889139.pdf
    • http://lesvossolidarity.org/images/how-to-get-free-turbo-builders-club-on-roblox_GM431946152.pdf
    • http://lesvossolidarity.org/images/free-robux-gift-card-codes_GM431946152.pdf
    • http://lesvossolidarity.org/images/rbx-hut-promo-codes_GM431946152.pdf
    • http://lesvossolidarity.org/images/how-to-get-roblox-clothes-for-free-2021_GM431946152.pdf
    • http://lesvossolidarity.org/images/robux-free-gift-card-org-hack_GM431946152.pdf
    • http://lesvossolidarity.org/images/roblox-ps4-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fb8.bin
bb46b003d66d94e3a0109e5f2e851fdee955e2b3febc15c44b1dcfe04ffefbb5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB8 22840 bytes
font_01_sfnt_off0000628d.bin
dda92339a1ab6b58eb0a2dd362524b8574c996d6fa5aa856ad84631870619099		 pdf-font-stream PDF embedded font (sfnt) at offset 0x628D 19376 bytes

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