Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d779ed5fe655a93…

MALICIOUS

PDF

42.0 KB Created: 2021-05-13 06:35:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f0bbf32bb51b9d82f32a9a7135e052fa SHA-1: 3d0a8d3a18f23e79bc7aa5daa23a90f29fada626 SHA-256: 8d779ed5fe655a93bcddc6ea70a1d2591f955b3ff1a596911f3647debe2e5142
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game-related content, such as 'free generator / game hack' and 'invoice/payment' language. The primary malicious URL identified is https://netcdn.xyz/app/479516143/minecraft-sign-up-free-game-hack. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a phishing or redirection attack, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/479516143/minecraft-sign-up-free-game-hack In PDF document text
    • http://stpc.it/images/coinmaster-links_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-spins-on-coin-master-app_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-free-soins_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/free-spin-link-coin-master-today_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/robux-claimer_GM431946152.pdfIn PDF document text
    • http://stpc.it/images/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/free-spin-link_GM406889139.pdfIn PDF document text
    • http://stpc.it/images/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • http://stpc.it/images/coin-master-fan-page-free-spins_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_003_off00004a60.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A60 24540 bytes
SHA-256: 5d605e2d71ca373a5ca740fad18caa340448a3df9c96fb007117a96b789faffb
font_01_sfnt_off00008205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8205 18220 bytes
SHA-256: 6236314a17f57ecfc4f63da4a6b9cb2d9143cd94f6dcae1b1ce204d4da3deb21

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