Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df6998d903be7e2…

MALICIOUS

PDF

44.8 KB Created: 2021-06-03 05:28:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7)
MD5: 5ae17dc69e9cb3c704547efb9ce167bf SHA-1: 1923870aeef1cfefa0fa2d9c9dee892902c2066d SHA-256: 1df6998d903be7e239386f738838723f27edfcb4b18aef7e0059c4f89afbebb6
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs and a heuristic firing for a PDF link farm, indicating a potential SEO scam. The document body, though partially corrupted, suggests a lure for 'Free Minecraft Capes' and includes a URL pointing to a download page. The presence of external URIs and the ML classifier's high confidence score suggest malicious intent, likely to redirect users to a malicious site or download unwanted software.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.online/app/479516143/free-minecraft-capes-game-hack
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/hack-coin-master-site-rssingcom_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-t-shirt-roblox_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-win-free-robux_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-more-robux-for-free_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-tiktok-followers-trial_GM835599320.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-free-bonus_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-free-cards_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-no-verification_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/robux-generators-that-actually-work_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-minecraft-for-free-on-pc_GM479516143.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/free-robux-2021_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/coin-master-hack-apk_GM406889139.pdf
    • https://digilib.stkip-pgri-sumbar.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdf
    • http://en.wikipedia.org/wiki/MIT_License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000532c.bin
473ad96695b14c161c9f1d66c68178662eb0e2390c85b8674e990b32f279161f		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532C 26156 bytes
font_01_sfnt_off00008e55.bin
dedc931f5c8bac627c7a83c769fddbd093390c6d69f02f50ba531346133b4d17		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8E55 17744 bytes

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