Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cfd014496db4e1c…

MALICIOUS

PDF

33.5 KB Created: 2021-07-19 11:22:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8652908061ebee7b5b9c1d1307cb9a55 SHA-1: 65fd2706e99f2d9cb37e70f0ea65a68e3b4013ad SHA-256: 8cfd014496db4e1ce1be4ea5d78a4c5ab89403b0674679ecafb577348125e6fb
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links designed to lure users into clicking on them by promising free game items and hacks. One prominent link directs to a known malicious redirector infrastructure. The document's content and embedded links strongly suggest a phishing or scam attempt, likely leading to further malware download or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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/431946152/free-robux-kid-friendly-no-human-verification-game-hack In PDF document text
    • https://koeltotaal.com/images/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-free_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://koeltotaal.com/images/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://koeltotaal.com/images/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://koeltotaal.com/images/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • https://koeltotaal.com/images/100-free-spins-coin-master_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
font_00_sfnt_off00002afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFB 22524 bytes
SHA-256: 1f8c6d5bd42e49661d4208714770ab0c06e1cc7bd5a0cbd466c68fb6459f8ee7
font_01_sfnt_off00005d47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D47 19476 bytes
SHA-256: c5aca30ee482ab97ef5a663076df94f5e48f22263153ac395a5dfe60051950ba

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