Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c0783b3ba4e7d2d…

MALICIOUS

PDF

33.3 KB Created: 2021-06-29 10:29:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: d842fe7ab49edce545866f415b7c8c64 SHA-1: f8bd94816f5f00e0901ed2ba4e8171d2f265ff11 SHA-256: 8c0783b3ba4e7d2d918dcb2d9bae56ca6e7f5c4c4b320649b7241e2cbbb01fd4
100 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a visual download button lure, directing users to a known malicious redirector. The document body content and extracted URLs suggest a lure for game-related cheats or currency, which is a common social engineering tactic. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/aux In PDF document text
    • http://lib.kunci.or.id/repository/roblox-hack-no-survey-no-download-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-cheat-engine-wallhack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-servers-that-allow-hacks_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/rblx-city-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-story-mode-free-download_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-in-roblox-sub_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/earn-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-stuff-links_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-united-nations-siterobloxcomgames_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/make-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-links-app_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hack-coin-master-spin-apk_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-accountds-in-roblox_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_off00002d94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D94 21600 bytes
SHA-256: fd833cf76b52d31e351c01f099d133afd245321e70bd0cfafa01a735a67f1963
font_01_sfnt_off00005d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0D 19012 bytes
SHA-256: 54225ff5dee568a3d596720021ca996342ba029adc896bac363c676be4b8e7dd

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