Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b47e727fb1383ee…

MALICIOUS

PDF

44.8 KB Created: 2021-06-13 17:01:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 8587ac8878d332514aaaf36097d04797 SHA-1: 25c9ffe0b8a6a1afe9004c369c3acfb9133ae4e4 SHA-256: 6b47e727fb1383ee36870ae5a1a04dbfe846041871a7e0e08be18ab5c039aa34
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple embedded URLs and a visual call-to-action, strongly suggesting a phishing or social engineering attempt. The ML classifier also flagged this PDF as malicious. The primary lure appears to be offering free in-game items for popular games, directing users to download further content from external URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.co/app/431946152/how-to-get-free-rocket-fuel-roblox-jailbreak-game-hack In PDF document text
    • http://lib.kunci.or.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-minecraft-videos_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-apk-hack-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-daily-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-gift-card-free-codes_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-coin-master-gifts_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/mcpe-master-coins-hack-download_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-email_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-rpg-games-to-steal-roblox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-999m-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-generator_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
stream_004_off00005164.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5164 25388 bytes
SHA-256: e2c5e6e2be09d1393f941a7ff9d81721cde6d8700bb417cc4ebf959e14cbd966
font_01_sfnt_off00008a5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5C 19040 bytes
SHA-256: 363d10248320bc5106ed2c3152213bb083661ec0b742ccdd690322c298a9dd7b

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