Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9fdc2c48a4c562b…

MALICIOUS

PDF

46.1 KB Created: 2021-06-03 11:26:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: df6025f9562ad639bb75b38d3c519e01 SHA-1: 305ee8e958b20eb7a3ba33c0f4db2869e6c95bee SHA-256: b9fdc2c48a4c562bd91ee5cc9b8ee40d621bd3af03063ea1268d05a34bb6d3fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to a known malicious redirector infrastructure, specifically promoting 'free generator / game hack' lures. The document body and extracted URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful websites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

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/406889139/free-spins-and-coins-for-coin-master-game-hack In PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/how-to-get-minecraft-bedrock-for-free_GM479516143.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spin-today-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/robux-gratis_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/cmaster-club-coin-master-hack-tool_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-gold-cards-hack-english_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-tix-generator_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-hack-ios-10_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/coin-master-free-spins-link-download_GM406889139.pdfIn PDF document text
    • http://digilib.unbari.ac.id/repository/daily-free-spin-coin-master-link_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
stream_004_off00004ea8.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA8 25448 bytes
SHA-256: df6eef0bf6aaf6b0afe57f7d8284536fe985efb5065d74d537ee6b1530a61b09
font_01_sfnt_off0000881c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x881C 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off00009207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9207 18060 bytes
SHA-256: d4954d2d00bde9f6a1061857a61d2c62c1ae360f44744af150ee923481526d51

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