Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3303b80f180b90b…

MALICIOUS

PDF

234.7 KB Created: 2021-07-06 05:11:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 328410b9f6c0c7dfc2123850e0dc25e2 SHA-1: af0239376deab0bd9eb30452a105545ef3baad77 SHA-256: a3303b80f180b90b2f48a62cb18b29e9a61d7c4c6f838804005f49a956f99bbf
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it is a lure for game hacks and redirects to known malicious infrastructure. The embedded URL http://netcdn.tw/app/1330123889/pubg-mobile-uc-xyz-game-hack is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2562

Heuristics 3

  • 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.
  • 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/1330123889/pubg-mobile-uc-xyz-game-hack In PDF document text
    • http://library.umla.ac.id/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/real-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hack-cheat-generator-coins-and-spins-unlimited_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/tiktok-free-download-for-android_GM835599320.pdfIn PDF document text
    • http://library.umla.ac.id/repository/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-xbox-free_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-free-com_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/can-pokemon-go-free-pokeballs_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-gain-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/hack-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/earn-points-for-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_024_off00037bc6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x37BC6 19581 bytes
SHA-256: 072221633c810c73195778bc231d0139ac7dcb9580bfce055fc6b0d4c22c2b10

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