Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca67ec04b228025…

MALICIOUS

PDF

45.5 KB Created: 2021-06-04 01:56:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 1e3acec7abd1b23b287d35d02731fc69 SHA-1: 50f7dc0eb83f16907f7f20e8f4af57aa1c406e2d SHA-256: 5ca67ec04b228025747dba375fcbaf1f85f4e8a8587e842088db00c3e31d0f70
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, that promise free in-game currency for games like Coin Master. The document body and heuristics indicate a lure to download or access these 'generators', which likely leads to malware or further malicious sites. No scripts were extracted, but the embedded URLs and redirector heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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-coin-and-spin-in-coin-master-game-hack In PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-websites-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/minecraft-login-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-robux-exe_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/minecraft-free-download-windows-10_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://pustaka.fhuk.unand.ac.id/repository/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005180.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5180 30716 bytes
SHA-256: 3f06a1613fd79089d7c3955bec50779c6f547bed347e7f65d4aeadbab6ca8544
font_01_sfnt_off00009021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9021 18060 bytes
SHA-256: e7e0a884e59d6d4457fb90cba238d6b772cb21bcfadc79e96e95c97f919ce424

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