Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a9e70ece7f6b52…

MALICIOUS

PDF

48.8 KB Created: 2021-06-03 07:51:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: a6e85d543484f88c7b3f0a7d8c22c8f2 SHA-1: 09e80d8b721330c88e1d5f1b5e04434fdfeaf469 SHA-256: 80a9e70ece7f6b523a38d043f23fa8e3028db3d4f6710103d2046d71ea0ba12d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors, specifically advertising "free generators" and "game hacks" for popular games. The primary malicious URL identified is https://netcdn.online/app/431946152/roblox-robux-generator-no-human-verification-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a redirection-based attack designed to lure users to potentially malicious content or further stages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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 https://netcdn.online/app/431946152/roblox-robux-generator-no-human-verification-game-hack In PDF document text
    • http://digilib.unla.ac.id/repository/is-there-a-way-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-game_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/my-roblox-account-was-hacked_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-112-2-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/pokemon-go-free-play_GM1094591345.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-level-3_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-club-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coins-on-coin-master-generator_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/rbx-hut_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-jailbreak-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-coins-on-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50EB 26712 bytes
SHA-256: 6f75194c235e350964845d742113043ced34619895cc936006f55f07f1f144fb
font_01_sfnt_off00008d69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D69 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00009a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7B 18772 bytes
SHA-256: d70e1896760ce565ff795a6c5d74f9ef69d680ae9e1e6e3d1ff99995b7d1b431

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