Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4e1f18d65073ac…

MALICIOUS

PDF

44.9 KB Created: 2021-06-10 23:50:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 481159da69d0ce4c3e9e093c8957bf1f SHA-1: ecc15bcb6f65391568de8afe57d78003147c90da SHA-256: 7f4e1f18d65073ac95df97dd294a7da6281339ed72d959d17fe46d8eee7c61a2
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs that lead to game hacks and cheats, with one URL identified as malicious redirector infrastructure. The presence of a visual download button and the ML classifier's high confidence score further support the malicious nature of this document. The document's purpose is to trick users into downloading potentially harmful files.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/roblox-hack-cheat-engine-6.7-game-hack In PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-cards-hack_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-hack-8-ball-pool_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-roblox-clothes-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/apps-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-daily-coin-master-coins_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/pubg-uc-or-pc_GM1330123889.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-hack-pc-cheat-engine_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/cheat-engine-roblox-bypass-download_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/how-do-you-get-free-cars-in-roblox-vehicle-simulatert_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-mod_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/free-spin-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-redeem-codes_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • https://fib.ub.ac.id/sac/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://fib.ub.ac.id/sac//repository/blogger-coin-master-free-spins_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_004_off000051a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A1 24736 bytes
SHA-256: 580675aa895487436295f923c8b190b481345d62e018512c835d75f5ff87cccf
font_01_sfnt_off00008a48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A48 19148 bytes
SHA-256: 6fecc71e045f867acb63c997197168cbf53cd00a4303f33d8de84e3ac83d17f4

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