Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e91fc7aa5e2eb8…

MALICIOUS

PDF

35.5 KB Created: 2021-05-21 22:39:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 5363ceb6dcf0ef3f0ff5b5d0e4de5ed8 SHA-1: c8d0168d83816095cd6a720ba5e27bbdda69cc85 SHA-256: a4e91fc7aa5e2eb885cbe8e961a459f1d6bba2392a5b119e1c47dca179949443
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and embedded links suggest a lure for 'free generators' or 'game hacks', aiming to trick users into downloading further malware. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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.xyz/app/835599320/how-to-get-free-tiktok-likes-game-hack In PDF document text
    • http://www.eaapiaria.es/images/coin-master-event-hack_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/what-games-give-you-robux_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://www.eaapiaria.es/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.eaapiaria.es/images/coin-master-hack-2021-apk_GM406889139.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_off00002ec5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2EC5 26660 bytes
SHA-256: 1bf38df858dbb6bb37f092e8304a49a2093766915d854364df1879334185c9b1
font_01_sfnt_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 17620 bytes
SHA-256: 741fb2b5b30d8c36687485fbf08913b92fc3b4be4da5bff93af7320c30ccb52b

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