Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0d73132abecb14…

MALICIOUS

PDF

42.6 KB Created: 2021-05-14 09:04:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: f11d6aef6a9b6c0eafbc0604b8e0b4e7 SHA-1: 7e54a12316e538482782455104da0acba634dd62 SHA-256: 3e0d73132abecb1419206d54cafd3277ae6c65bbf3395d3f447d27e3cb098666
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are structured as SEO link farms for game-related cheats and free virtual currency. The document body and embedded links suggest a lure for users seeking 'free Robux' or game hacks, likely leading to malicious sites or further malware. The ML classifier strongly indicated maliciousness, and the PDF structure with mass external links supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/431946152/free-robux-not-a-scam-game-hack
    • http://www.maakherumusic.net/images/hack-master-coin_GM406889139.pdf
    • http://www.maakherumusic.net/images/free-robux-websites-that-actually-work-2021_GM431946152.pdf
    • http://www.maakherumusic.net/images/coin-master-free-spins-link-without-human-verification_GM406889139.pdf
    • http://www.maakherumusic.net/images/get-free-spins-on-coin-master_GM406889139.pdf
    • http://www.maakherumusic.net/images/how-to-get-free-robux-for-real_GM431946152.pdf
    • http://www.maakherumusic.net/images/how-to-get-roblox-premium-for-free_GM431946152.pdf
    • http://www.maakherumusic.net/images/free-roblox-hair-boy_GM431946152.pdf
    • http://www.maakherumusic.net/images/aternos-free-minecraft-server_GM479516143.pdf
    • http://www.maakherumusic.net/images/get-me-free-robux_GM431946152.pdf
    • http://www.maakherumusic.net/images/coin-master-hack-unlimited-spins-and-coins-cheats_GM406889139.pdf
    • http://www.maakherumusic.net/images/fast-robux-online_GM431946152.pdf
    • http://www.maakherumusic.net/images/play-minecraft-free-online-no-download_GM479516143.pdf
    • http://www.maakherumusic.net/images/coin-master-instagram-free-spins_GM406889139.pdf
    • http://www.maakherumusic.net/images/coin-master-firebird-card-free_GM406889139.pdf
    • http://www.maakherumusic.net/images/cheats-coin-master-free_GM406889139.pdf
    • http://www.maakherumusic.net/images/how-to-make-free-robux_GM431946152.pdf
    • http://www.maakherumusic.net/images/how-to-get-free-robux-without-doing-anything_GM431946152.pdf
    • http://www.maakherumusic.net/images/coin-master-hack-game-download-mod-apk_GM406889139.pdf
    • http://www.maakherumusic.net/images/roblox-free-robux-hack_GM431946152.pdf
    • http://www.maakherumusic.net/images/best-way-to-get-free-robux_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000047c3.bin
24469598f6ace0e65d05745443f296002ff1a9a3ae8b9a42866e27fd52c8de0f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47C3 26200 bytes
font_01_sfnt_off00008325.bin
99f87fd07008d852f5f659b56544f95afedf5ace2cc64bf1a6de85fca727b1b9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8325 18608 bytes

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