Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8d56b004beed2dc…

MALICIOUS

PDF

47.1 KB Created: 2021-06-09 13:21:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2c87c20ecc61c5934fdc27c2b720b653 SHA-1: f366c3460e1b5f241e44ff7fd93a82a7ada31352 SHA-256: b8d56b004beed2dce5562ecfa5f970392b21c9fb5a524be00e16e50095a061fe
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to websites offering game-related cheats or free items, a common lure for phishing and scams. The heuristic 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms that the links point to known malicious infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to drive users to a malicious site, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.tw/app/431946152/www.get-free-roblox.com-game-hack In PDF document text
    • http://digilib.stiki.ac.id/repository/proprofs-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-food-for-pet_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/biggerhead-roblox-free_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/minecraft-launcher-download-free_GM479516143.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/earn-rbx_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/easy-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/rare-free-links-to-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/what-is-bad-about-roblox-free-models_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/roblox-parkour-hack-script_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/free-robux-app-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stiki.ac.id/repository/scaffold-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005166.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5166 24312 bytes
SHA-256: 0e7331ad5856691223cc8f728172e65462bf193192b53ac4d0eb5e38ae3fb1a7
font_01_sfnt_off00008913.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8913 2872 bytes
SHA-256: c99ae1e18c85745b872cec3b6e961f98101e55ddf308cd7ca8b8a3fb0101e183
font_02_sfnt_off000092fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92FA 19028 bytes
SHA-256: ef11b7180821cc0bd6edac0e829f3423ff484d9f80c26fe794102fff7cd76136

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