Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1790001664d800f…

MALICIOUS

PDF

35.6 KB Created: 2021-07-04 01:32:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2e88b58fb4e64a13c5ca12a6d7a95c3d SHA-1: 98220cb02aceefaf4d0caf939ecf252a07ee7069 SHA-256: b1790001664d800fd487a1ff36df05e401a081d9e5cc21b9ce159f44fdaadfd1
102 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded URLs, many of which are structured as SEO link farms pointing to game-related cheats and hacks. The document body explicitly mentions 'Free Roblox Accounts With Robux' and includes a primary URL for downloading such content. This indicates a social engineering attempt to trick users into visiting malicious sites or downloading further malware.

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/431946152/free-roblox-accounts-with-robux-that-work-not-banned-game-hack PDF link annotation
    • http://perpustakaan.dutadharma.ac.id/repository/hack-aimbot-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-cheat-exploit-juillet-2021-for-car-crusher-2-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-32-mod-hack-unlimited_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/robux-hacks-admin-commands_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-how-to-get-in-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-working-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/code-for-the-roblox-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-mars-mining-simulator-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-a-couple-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/best-games-on-roblox-that-are-free-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-no-verification-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-game-download-pc-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-roblox-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/tips-and-hints-to-get-robux-for-free-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3207 22472 bytes
SHA-256: 58b20cfedb30d55130226021e09c0401b359c5bf0dbb01645cc9d3b85f02bec0
font_01_sfnt_off00006478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6478 19720 bytes
SHA-256: e7aa0a474f873a6e751f5083720d35e515444fa97241f03d9058db0775c81672

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