Malicious PDF — malware analysis report

Static analysis result for SHA-256 56760bc42399afa5…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 03:44:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aa0c9edb4d25d2d8acfcbbff0f285738 SHA-1: 214b3bb67b28163d075a477f1caa430ff6ac64af SHA-256: 56760bc42399afa5fef96a463a493eb49c4c54803e7e5f8f25dc8b9974be5c1a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector domains that are associated with malicious activity, specifically luring users with game-related cheats and hacks. The document body and extracted URLs strongly suggest a phishing or scam attempt to drive traffic to these malicious sites. While no scripts were explicitly extracted, the nature of the lures and the presence of redirectors indicate a likely intent to download further malicious content or lead users to credential harvesting pages.

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/get-free-spins-coin-master-2021-game-hack In PDF document text
    • http://librarysenior.com//repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-2021-new_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-robux-com-real_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-hack-no-survey_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/microsoft-store-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com/repository/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-free-spin-best-link_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/minecraft-pe-free-download-ios_GM479516143.pdfIn PDF document text
    • http://librarysenior.com/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • http://librarysenior.com//repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://librarysenior.com//repository/coin-master-ios-hack-download_GM406889139.pdfIn PDF document text
    • http://librarysenior.com/repository/free-tiktok-likes-and-views_GM835599320.pdfIn PDF document text
    • http://librarysenior.com//repository/toolbox-for-minecraft-windows-10_GM479516143.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
stream_002_off000033ff.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33FF 22732 bytes
SHA-256: ac43985544e295d8db7281610f06f37fe7b133e03dfcefe3d9f5b2a2cb5155d4
font_01_sfnt_off000066a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A6 18576 bytes
SHA-256: 47068641d4cd5afad495b2744cbb78709b2a1d88425159384b1e35df59296f67

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