Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac2e256bd6a08f3…

MALICIOUS

PDF

46.0 KB Created: 2021-05-14 17:47:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 746de9179c59eab4957f6453aeb697a9 SHA-1: eb9b325d2f07d7aed5a1504116d66b76a37b1a35 SHA-256: 5ac2e256bd6a08f3413fd71344f883ee75ec8ddac4e3c8701abe3d27ed8d916d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a heuristic firing for a PDF link farm, suggesting a malicious intent to redirect users to external content. The document body mentions "Jailbreak Roblox Hack" and includes a URL pointing to a similar resource, indicating a lure for potentially harmful downloads or exploits. The presence of many external links, likely for SEO manipulation, further supports a malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/jailbreak-roblox-hack-game-hack
    • http://zercalo.org/images/free-robux-generator-no-human-verification-2021_GM431946152.pdf
    • http://zercalo.org/images/free-promo-codes-for-robux_GM431946152.pdf
    • http://zercalo.org/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdf
    • http://zercalo.org/images/coin-master-fan-page-giveaway_GM406889139.pdf
    • http://zercalo.org/images/no-robux_GM431946152.pdf
    • http://zercalo.org/images/get-free-robux-com_GM431946152.pdf
    • http://zercalo.org/images/how-to-get-free-minecraft-windows-10_GM479516143.pdf
    • http://zercalo.org/images/how-to-install-minecraft-for-free_GM479516143.pdf
    • http://zercalo.org/images/minecraft-free-download-mac_GM479516143.pdf
    • http://zercalo.org/images/rbxoffers-com-free-robux_GM431946152.pdf
    • http://zercalo.org/images/free-minecraft-account-and-password-2021_GM479516143.pdf
    • http://zercalo.org/images/uprobuxcom-free-robux_GM431946152.pdf
    • http://zercalo.org/images/google-coin-master-free-spins_GM406889139.pdf
    • http://zercalo.org/images/moonactive-coin-master-free-spins-link_GM406889139.pdf
    • http://zercalo.org/images/download-minecraft-free-hiapphere_GM479516143.pdf
    • http://zercalo.org/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdf
    • http://zercalo.org/images/how-to-get-free-cards-for-coin-master_GM406889139.pdf
    • http://zercalo.org/images/minecraft-java-server-hosting-free_GM479516143.pdf
    • http://zercalo.org/images/coin-master-hack-without-verification-ios_GM406889139.pdf
    • http://zercalo.org/images/roblox-free-download_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046b1.bin
4b46964fe31a57280a027281f4cad6ef7a10e5455872157702b9214d998bce74		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46B1 26008 bytes
font_01_sfnt_off0000837b.bin
450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139		 pdf-font-stream PDF embedded font (sfnt) at offset 0x837B 5696 bytes
font_02_sfnt_off0000908d.bin
47180ef6fd58f08eabdcf8de8850cf434555edaa977bcc29afa6d0c928aef64e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x908D 18468 bytes

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