Malicious PDF — malware analysis report

Static analysis result for SHA-256 d288b44741c6401f…

MALICIOUS

PDF

42.7 KB Created: 2021-05-10 22:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: a97430d7c77f39fd46b318139210fc3f SHA-1: aaaf84de2552266dfb01cec89528b7849c765d67 SHA-256: d288b44741c6401fedaa200b0cde2e66ff58501115b127c420edbcf56559d87a
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that point to known malicious redirector infrastructure, specifically targeting game-related hacks and mods. The ML classifier also flagged this PDF with high confidence. The presence of a visual download button further supports the lure, suggesting the document aims to trick users into downloading a second-stage payload.

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/479516143/xray-mod-minecraft-1.14-game-hack In PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-2021-android-apk_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-free-spin-realme-products_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/roblox-free-clothes-hack_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/master-hack-coin_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/can-you-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id/repository/coin-master-free-spins-link-download-apk_GM406889139.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/free-robux-hack-us_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/best-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/cool-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://lib.unitri.ac.id//repository/how-to-get-free-coins-for-coin-master_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
stream_003_off00004a57.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A57 25256 bytes
SHA-256: b148b31cd4a40f8c97395ef257423c05ba30bec1c23e4f72d2cb370bf5a9247d
font_01_sfnt_off000083a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83A9 18528 bytes
SHA-256: 27dc6fe7fa9d284304e2d20a0fdf89d35739861aca7d0ce8ff0497fb2d5c6676

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