Malicious PDF — malware analysis report

Static analysis result for SHA-256 044324d4fe8865ae…

MALICIOUS

PDF

35.1 KB Created: 2021-06-27 15:34:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e8928d467434e5cfde16fe3e4e9280c8 SHA-1: 152ce5e8980d8601e1dc52a38ffa3d4507a9d3c3 SHA-256: 044324d4fe8865aedc17088fd2532f0ea5c1e2b46df0117e336f3bb99f0802aa
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which are structured as a link farm, directing users to pages offering game-related cheats and currency. The ML classifier strongly indicated maliciousness, and the presence of numerous external URIs suggests an attempt to redirect users to potentially harmful sites. While no scripts were explicitly extracted, the PDF structure and link farm heuristic point to a social engineering tactic to drive downloads or visits to malicious content.

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.co/app/431946152/roblox-free-ship-code-game-hack PDF link annotation
    • http://perpus.fisip.unnur.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-cracked-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-apk-hack-mod-download_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-game-free_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-gear-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-bloxburg-free-release-date_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/hack-for-roblox-that-gives-more-money-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-get-free-robux-no-human-verification-moblie_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/how-to-gte-free-robux-codes-for-pc-2021-october_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/roblox-xeno-hack_GM431946152.pdfIn PDF document text
    • http://perpus.fisip.unnur.ac.id/repository/discord-free-robux_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_off0000314f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x314F 22468 bytes
SHA-256: 80425d4a657199583397a7a51839dff11bd41c5b81f4edd9f084d000c5cb240c
font_01_sfnt_off0000639a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x639A 19288 bytes
SHA-256: 076d248ead406759aaf9193f1a900d55cd8dc4ce66a8693aafb668569f5fdc70

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