Malicious PDF — malware analysis report

Static analysis result for SHA-256 d520650ae41e2fdb…

MALICIOUS

PDF

44.7 KB Created: 2021-06-03 08:51:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3c8ec22dc724bed34d304f78a02354cd SHA-1: c61efab152b5ff2d1570e48cbdfc68ec1e0a66d3 SHA-256: d520650ae41e2fdb410196b7b13be18889d08a05bbb43d9f088a98182efa1677
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and game hack lures, indicating a phishing or malware distribution attempt. The presence of embedded URLs and a visual download button further supports this. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest malicious intent, likely leading to a second-stage download.

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 https://netcdn.online/app/406889139/free-coins-coin-master-blog-game-hack In PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/where-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/does-pubg-uc-generator-work_GM1330123889.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/spin-coin_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-realms-free_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-win-free-robux_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/tiktok-like-bot-free_GM835599320.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/minecraft-free-download-unblocked_GM479516143.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • http://www.gzvisiontech.com/Public/upload/editorfiles/hack-coin-master-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005025.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5025 28828 bytes
SHA-256: ae06600d411bcbc8df5a140e5a5c4167c938dbed4b81252ed6610cbcfe9efe9f
font_01_sfnt_off00008c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C4D 18288 bytes
SHA-256: 525699ae71861fffeab431a07c950b4914d38a871fb98becad0e0bea9ac3f1df

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