Malicious PDF — malware analysis report

Static analysis result for SHA-256 79fb51a31dd94b40…

MALICIOUS

PDF

34.5 KB Created: 2021-06-25 19:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f8a4eac8f29c4a9aa06c7d5778d73142 SHA-1: 6ae9de278e26dff78a456b8f50c7d001614b04d0 SHA-256: 79fb51a31dd94b40e65e830e9a993df6618cf5c0f342d5bfd38e402e87aad8e0
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, many of which are presented as download opportunities for game cheats and hacks. The ML classifier strongly indicated maliciousness, and the presence of a link farm heuristic suggests an attempt to generate traffic or distribute malware. The document's content and structure are consistent with a phishing or malware distribution lure.

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/cheat-lib-roblox-game-hack
    • http://pustaka.fti.unand.ac.id/repository/coin-master-tricks-and-hacks_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/tower-of-hell-roblox-hack_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/roblox-2-player-gun-factory-tycoon-money-hack_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id//repository/roblox-free-robux-codes_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/cute-free-hair-on-roblox_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-tiktok-followers-no-human-verification_GM835599320.pdf
    • http://pustaka.fti.unand.ac.id/repository/oprewards-com-robux_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id//repository/http-bit-ly-coin-master-hack_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id//repository/pubg-uc-live_GM1330123889.pdf
    • http://pustaka.fti.unand.ac.id//repository/wurst-client-18-9_GM479516143.pdf
    • http://pustaka.fti.unand.ac.id//repository/minecraft-112-2-hacked-client_GM479516143.pdf
    • http://pustaka.fti.unand.ac.id/repository/free-roblox-card-codes-2021_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/minecraft-nintendo-switch-digital-code-free_GM479516143.pdf
    • http://pustaka.fti.unand.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdf
    • http://pustaka.fti.unand.ac.id/repository/roblox-assassin-aimbot-hack_GM431946152.pdf
    • http://pustaka.fti.unand.ac.id/repository/roblox-free-hair-boy_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fc0.bin
96633f5b01601f5b3bbb5f71e18005fa5ed69c323689ca9e02d3b5d9c683e13a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2FC0 22600 bytes
font_01_sfnt_off0000625c.bin
9b819a01259181a0a95b183a44f109d11e3e868a63cbcac418504c494fde414d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x625C 18876 bytes

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