Malicious PDF — malware analysis report

Static analysis result for SHA-256 6163ed8b3dc69398…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 20:16:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 61bc605df2c381bfa29d2cf40c8388f8 SHA-1: 3368ccb79fd658e1ba9b53b1385326e9a2feb945 SHA-256: 6163ed8b3dc6939850668c841c5bc8dcc4e8f39f3bd3877365f90e88b54c7b36
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, disguised as free game hacks or generators. The document body and heuristics indicate a lure to trick users into clicking these links. While no scripts were explicitly extracted, the nature of the PDF and its embedded links suggest it's designed to lead the user to a malicious website, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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 http://netcdn.tw/app/431946152/is-roblox-free-on-pc-game-hack In PDF document text
    • http://lib.uho.ac.id/library//repository/is-minecraft-free-on-pc_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/toolbox-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/tiktok-free-view-editor_GM835599320.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hacks-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/girl-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/roblox-cheats-csgo_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/minecraft_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/best-free-minecraft-server-hosting-reddit_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/robux-hack-tools_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/coin-master-hack-mod-apk-unlimited-spin-download_GM406889139.pdfIn PDF document text
    • http://lib.uho.ac.id/library//repository/wurst-hacks_GM479516143.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://lib.uho.ac.id/library/repository/coin-master-free-spins-link-no-verification_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
font_00_sfnt_off000030ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30ED 21480 bytes
SHA-256: 0efe9e6ed47f59cc4460c8a52df30da3378615f039c8eb5e8a63a336a6fe14cc
font_01_sfnt_off00006021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6021 18804 bytes
SHA-256: 3dd3efe1b23c7876eb0e6362499b06481da0ce89f8867ccdf7f013bd29495768