Malicious PDF — malware analysis report

Static analysis result for SHA-256 77bafa86bfeb23c6…

MALICIOUS

PDF

45.9 KB Created: 2021-05-17 15:25:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 59e46068a5a5e31d52b58878747b1fa8 SHA-1: a239238910c408c8cb99439611250ce4e45ee129 SHA-256: 77bafa86bfeb23c637ea8d59fe84a20579694e9937c912b2f535c5cf557373f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that redirect to known malicious infrastructure, specifically promoting "game hacks" and "generators". The primary lure URL is https://netcdn.xyz/app/406889139/hack-coin-master-with-lucky-patcher-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate malicious redirection, likely intended to lead users to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9432

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/406889139/hack-coin-master-with-lucky-patcher-game-hack In PDF document text
    • http://ptts.pl/images/microsoft-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-spins-and-coins-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/best-free-robux-sites_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/easiest-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/spinuri-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/dailyrobux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-free-mighty-lion-card_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/coin-master-hack-generator-tool_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/free-coin-master-app_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/static-moonactive-net-link_GM406889139.pdfIn PDF document text
    • http://ptts.pl/images/get-robux_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://ptts.pl/images/minecraft-svg-free_GM479516143.pdfIn PDF document text
    • http://ptts.pl/images/roblox-games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off0000475d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x475D 27200 bytes
SHA-256: bfb50155c7284836d78920566593608a334da1a566c43c8988c6e704aecac122
font_01_sfnt_off00008663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8663 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9015 18552 bytes
SHA-256: 2ef819c75b3a0e1f10814af5d5822ed8fdf4a5514fe4edddd3d35c731c38b399

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