Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7dbdf6c9f45221…

MALICIOUS

PDF

43.0 KB Created: 2021-05-20 00:34:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e5695750cdb36d89e01b520f77873a99 SHA-1: 54c396baaf8d3efc50eee9f0acceb97900a187e5 SHA-256: de7dbdf6c9f45221960c6e5609a1f77deb42696e533e551caedff58fadb9fc70
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting free in-game currency or items. The ML classifier strongly flagged this PDF as malicious, and the presence of a download button lure reinforces the deceptive nature of the document. The primary IOC is the redirector URL, which is likely used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/blox.page-free-robux-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/pubg-uc-carding-quora_GM1330123889.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-codes-2021-real_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/win-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-co_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/claim-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-free-download-apk-softonic_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-pe-apk-download-free-015-0_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/pokemon-go-free-promo-code_GM1094591345.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
stream_003_off00004903.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4903 25520 bytes
SHA-256: 89f6893d2bbbab357d6a3564b9e40383f12c6a000b3ceff6252645e5d0213b22
font_01_sfnt_off000083ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83EF 18848 bytes
SHA-256: 477bf2ef93abdd264292ffad6df1a1b97b65e35661cdcc3b49278aa82d19b07c

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