Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cd47a6ac68064d2…

MALICIOUS

PDF

35.3 KB Created: 2021-07-05 07:22:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 739a487b88fc3a4331e1b05e05d376e2 SHA-1: d423c913809d12ad723ab1c6743f33ae22b03650 SHA-256: 2cd47a6ac68064d2c525da0a0797ee312d8ca63efd240f8f4864e790557ddf37
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which are related to game hacks and cheats for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to drive traffic to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/how-to-get-coin-master-free-spin-link-game-hack
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-hack-roblox-with-inspect-element-2021_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/glitch-foe-free-clothes-in-roblox-2021_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-zone-free-robux_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-credit-on-roblox-twisted-murderer_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-free-pets_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-advertise-roblox-games-for-free_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-hacks-2021_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-html_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-roblox-accounts-with-robux-2021_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-for-free_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/legit-coin-master-hack-site-zyngaplayerforumscom_GM406889139.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/infinite-moneyz-roblox-injector-hack_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/how-to-get-free-robux-in-5-minutes_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-2-player-gun-factory-tycoon-money-hack_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/codes-to-get-free-robux_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/free-robux-hack-2021_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/10-roblox-gift-card-free_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/hack-roblox-pc-download-no-clip_GM431946152.pdf
    • http://www.pspmrsmkkb.com/webopac/repository/roblox-aesthetic-outfits-free_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off0000323f.bin
7ec99c420c55b311ab1d18f106aa23242f7197ba73b54d91a75dae392afa3004		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x323F 23224 bytes
font_01_sfnt_off000066ba.bin
3ad8961e57dc724dc20a452ead4f3451e43043d4ea6671b14ac2553528afab9c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66BA 18508 bytes

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