Malicious PDF — malware analysis report

Static analysis result for SHA-256 8639d2a24f4133dd…

MALICIOUS

PDF

45.3 KB Created: 2021-06-11 05:31:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 2fa35e9682b51de90bb1fca10ddfd901 SHA-1: 811bbddaf4a96c61d8ed6cc4737741260e8fd6b8 SHA-256: 8639d2a24f4133ddb82e6b07ab6d4912d71a48c1480ef6d56a16a0b422a5faec
102 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are structured as SEO link farms. The primary URL, https://netcdn.tw/app/431946152/nico-hacker-2-parte-de-roblox-game-hack, suggests a lure related to game hacks. The presence of a 'download button' heuristic further supports the interpretation that the document is designed to trick users into clicking malicious links. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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 https://netcdn.tw/app/431946152/nico-hacker-2-parte-de-roblox-game-hack
    • http://library.fk.upnvj.ac.id/repository/free-hats-in-roblox-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-fb-free-spins-link_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/hack-coin-master-free-spins_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/hack-coin-master-without-human-verification_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-promo-codes-july-2021_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-make-a-server-in-minecraft-java-for-free_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/roblox-street-simulator-money-cheat_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/google-coin-master-free-spins_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-app_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-codes-generator_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-items-on-roblox_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-link-2021-iphone_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-without-verification-2021_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/minecraft-kill-aura_GM479516143.pdf
    • http://library.fk.upnvj.ac.id/repository/free-spin-coin-master-app-download_GM406889139.pdf
    • http://library.fk.upnvj.ac.id/repository/how-to-get-more-robux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/a-roblox-hacks_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/instantrobux_GM431946152.pdf
    • http://library.fk.upnvj.ac.id/repository/free-robux-no-verify_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005472.bin
6f7268e4b235e1f677097077b037f976349eeeff94f77e2b0d3bb5a9e586158a		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5472 25504 bytes
font_01_sfnt_off00008cce.bin
15b5c31c896493e8e9f348f45ad430c62781dc9e515035d8211743d761592d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8CCE 18852 bytes

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