Malicious PDF — malware analysis report

Static analysis result for SHA-256 01bacc2fe6eced22…

MALICIOUS

PDF

34.9 KB Created: 2021-06-25 10:06:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ea42589547a9169f97d52f73b6547ac9 SHA-1: b70a0ad626779163bfdbc84196c9ab827ff43853 SHA-256: 01bacc2fe6eced22aa94b6f6e906f45f7b5cfb586450dc5bb29e897e2c176448
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links to external resources, many of which are presented as cheat or hack scripts for popular games. The heuristic PDF_SEO_LINK_FARM indicates a large number of these links, suggesting a link farm designed to attract users searching for game cheats. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of this document, likely intended to deliver malware or lead users to malicious websites.

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/prison-break-roblox-hack-script-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/roblox-brocken-bones-4-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-coin-master-download-ios_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/working-roblox-lua-c-welcome-to-bloxburg-hack_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/hack-coin-master-apk-358_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/pubg-uc-free_GM1330123889.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-gift-ard-pin-robux_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/minecraft-svg-images-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/mcpe-master-hack-unlimited-coins-latest-version_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-robux-without-verifying_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_off0000306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306C 22688 bytes
SHA-256: a44d8c349178a9964c12693b2740562cc4ad2bafcb5549534dec992abfb3e3b1
font_01_sfnt_off000062f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62F8 19212 bytes
SHA-256: 7528bed4a253664152216dc6df505e6cd20e44f98129d7d03c345ba50b5204b1

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