Malicious PDF — malware analysis report

Static analysis result for SHA-256 1807226dee35757b…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 04:30:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: b6a69578d6b6b1ea807d5cee01d7f98e SHA-1: aa309e95b9d03f4b1df96bffe77d815a812261dc SHA-256: 1807226dee35757b611f088c052d7a9e76f536961117f58d221a0fc725036f39
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs that are designed to lure users into clicking them by promising rewards for popular games. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a malicious intent to redirect users to potentially harmful sites. The ML classifier also flagged this PDF as malicious with high confidence.

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/406889139/coin-master-free-redeem-code-game-hack PDF link annotation
    • http://lib.mbp.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-codes-inspect-element_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/rocash-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/ways-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-links-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-for-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/how-to-get-free-spins-on-coin-master-facebook_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/911-whats-your-emergency-my-roblox-accout-got-hack_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.mbp.ac.id/repository/coin-master-free-spins-hack-but-no-surveys_GM406889139.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_off00003072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3072 22804 bytes
SHA-256: b3a62dd6582757039a0a0d17f200d13b4cadcff84c2dbcc559fb73882f5e9fb1
font_01_sfnt_off00006385.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6385 18432 bytes
SHA-256: 5dea6828f10c6d475ac08eedb2a46cdce9e4f7fa2af90066785ff5216698df8b

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