Malicious PDF — malware analysis report

Static analysis result for SHA-256 41cdc60782bea5a7…

MALICIOUS

PDF

34.7 KB Created: 2021-06-29 20:32:59 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 87638fc15ecb757a70bc3f0900a12a26 SHA-1: 20fd7ca34a18bde58c457b1df4bcde546bc55455 SHA-256: 41cdc60782bea5a7481d21780ac6ed069b655c250ac52323cf464928ad0ff5ef
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, many of which point to resources related to game hacking and exploits, suggesting a lure for users to download potentially malicious content. The heuristic findings indicate a link farm designed to attract traffic, and the ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs and the nature of the document content strongly suggest an attempt to facilitate the download of a second-stage payload.

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/script-hack-jailbreak-roblox-game-hack
    • http://digilib.akbidarrahma.ac.id/repository/sans-shirt-roblox-free_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/shooting-roblox-free-too-play-on-line_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-games-free-to-play-online_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-roblox-toy-redeem-code_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-minecraft-realms-to-join_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-link-no-verification_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/phantom-forces-roblox-hack-2021_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/how-to-hack-roblox-robux-with-inspect-element_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/how-to-hack-someones-minecraft-account_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/claim-free-robux-button_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/free-free-robux_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/blogger-coin-master-free-spins_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-35-2-hack_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/how-to-get-free-spins-for-coin-master_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/coin-master-free-spins-link_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/minecraft-pe-hacks_GM479516143.pdf
    • http://digilib.akbidarrahma.ac.id/repository/get-free-cards-coin-master_GM406889139.pdf
    • http://digilib.akbidarrahma.ac.id/repository/fly-cheat-in-roblox-engine_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/how-to-ban-someone-in-roblox-hack_GM431946152.pdf
    • http://digilib.akbidarrahma.ac.id/repository/how-to-kick-a-hacker-in-a-server-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002df8.bin
ae217bff45a1671a980624f45fec7b9fb8df6f2ba8b832a50bba24af402677f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2DF8 23144 bytes
font_01_sfnt_off000061e7.bin
9208501cb8b985f16bffc5da09e0b6ac370a0358da69dca399d4f18f64488548		 pdf-font-stream PDF embedded font (sfnt) at offset 0x61E7 19224 bytes

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