Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3558a1b56a39054…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 17:05:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 32e7393478359999b66377d11c9ff2d7 SHA-1: a3b98511f60f6e61c3a48e879f35ef390cd963b0 SHA-256: f3558a1b56a39054a123133ac8624066d3cca0ddf070c702664e93078810f5c0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, masquerading as game hacks or generators. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, but the document's structure and embedded URLs strongly suggest a phishing or redirection attack.

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/479516143/minecraft-realms-free-trial-game-hack In PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-creater-codes-to-get-you-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/dominus-infernus-free-that-cost-1-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-become-a-admin-in-roblox-no-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/proxo-cheat-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-no-hack-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-bloxburg-build-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacks-for-roblox-tower-battles_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-apocalypse-rising-hack-gui_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-and-bc-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-2021-apk_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-with-cheat-engine-62_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-unlimited-spins-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/get-free-spins-on-coin-master-no-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-candy-song_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-and-limiteds-hectic_GM431946152.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_off000032d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32D9 22988 bytes
SHA-256: 94eb892ca94e3f8cacd4abaad8030de238d156621ecf4539875adbfbb468ca2e
font_01_sfnt_off00006615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 18192 bytes
SHA-256: c84c0c9224042ec5c518f6bb4a140ed5e4ee0a480a1adfcfecce085ac4978d3d

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