Malicious PDF — malware analysis report

Static analysis result for SHA-256 5973ceb226bea861…

MALICIOUS

PDF

27.0 KB Created: 2021-07-06 05:17:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: afa032fdc5efc087c87a60ea993b4cea SHA-1: a883190fd64d07f0033ca70562772438f0cfa0b7 SHA-256: 5973ceb226bea861ca5299f5b1d81b62153630d5d91be56a2776c19352e7bb88
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a prominent link disguised as a 'free generator / game hack' lure, which is identified as a known malicious redirector. The embedded URL, http://netcdn.tw/app/406889139/coin-master-hack-no-survey-or-verification-game-hack, is the primary indicator of malicious intent. This pattern suggests a phishing or scam attempt designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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/406889139/coin-master-hack-no-survey-or-verification-game-hack In PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox-apk-hack_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-robux-codes-generator_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-roblox-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/pokemon-go-free-ultra-box_GM1094591345.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/coin-master-free-coins-and-spins-app_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/does-coin-master-hack-work_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/claim-free-robux-button_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/i-got-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.library.umbjm.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3129 22556 bytes
SHA-256: 6d6e5f973f5d862a0352f5b1a545f6178f4bc8eb80774d0cc28cf197cbe7e1df

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