Malicious PDF — malware analysis report

Static analysis result for SHA-256 2cc774737f76b644…

MALICIOUS

PDF

34.5 KB Created: 2021-07-03 21:32:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: d1c4c5b9c4d318156288ca76c02f1ee6 SHA-1: d2e5eb9bb4f34f05c2d0f53878f0c1afd731769a SHA-256: 2cc774737f76b644c8288f2edf32637ddfd2e3fdc557569a6ef361f48c39b762
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that redirect to a malicious website, disguised as a 'game hack generator'. The presence of a download button lure and the ML classifier's high confidence score indicate a malicious intent to trick users into visiting potentially harmful sites. No scripts were extracted, but the embedded links are the primary vector for this attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-hack-quora-game-hack In PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/why-free-robux-is-not-true_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/plug-toolbox-for-minecraft-free-ios_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/no-human-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-download-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/how-to-earn-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/how-to-get-free-snacks-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/free-spin-coin_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/minecraft-games-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/roblox-games-to-play-for-free_GM431946152.pdfIn PDF document text
    • http://www.digilib.uim.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://digilib.uim.ac.id/repository/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000312a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x312A 22656 bytes
SHA-256: 210221a4a118c13bcc4358bccd818ff77630cf5baa421f29c2726dde47d9c192
font_01_sfnt_off000063c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C1 18300 bytes
SHA-256: 13570105f39c98c31ea3b7ffc2e1e4ec0e3848231a5c84cff4cabeced162f774

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