Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff8f8f5a0135afd2…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 22:20:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6ac5b9b44560b974f40dd7fd4478aa7f SHA-1: 4fc4234080d7005a8c0c7078d829eba673b8446a SHA-256: ff8f8f5a0135afd232fce21dc730140e067c5c8c4fb966faa6f5efcc28e09d96
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'free game hacks' for Roblox and other games. The primary lure appears to be a 'free generator / game hack' for Roblox, directing users to a URL associated with known malicious redirectors. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely to download further malware or engage in credential harvesting.

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.co/app/431946152/black-shirt-free-roblox-game-hack In PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hacks-for-de-oride-isle-sanatorium-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-girl-avatar_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-get-free-cards_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/new-hack-for-roblox-deathrun-2021-november_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-get-hacks-in-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/hack-spin-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/roblox-emergency-response-cheats_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-roblox-jailbreak-for-vip-server_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/how-can-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/minecraft-windows-10-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://perpustakaan.dutadharma.ac.id/repository/coin-master-free-spins-link-2021-hack_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_off00003021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3021 22188 bytes
SHA-256: 8e292c9352f8ebe556874fb8ae3be8d4a1c2168e379bcc8509535e9a834b40c1
font_01_sfnt_off0000615f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x615F 19212 bytes
SHA-256: 1a168377145f3aeaa30a2143e31f8de2bd815312f97f09498299b42ca2443dab

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