Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9b710f58f9acf5d…

MALICIOUS

PDF

55.4 KB Created: 2021-05-20 06:45:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 493e0219a9d2387679b9d1265a28ed8f SHA-1: 2ac57446a55b299274fb1bcb1cddd69dacaf3bc0 SHA-256: a9b710f58f9acf5d04031be7025960694c1b65a350de9efb65ecd59dba10dfe0
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links that redirect to malicious infrastructure, specifically promoting 'game hacks' and 'free generators'. The presence of PDF_MALICIOUS_REDIRECTOR_LINK and PDF_GAME_HACK_REDIRECT_LURE heuristics strongly indicates a phishing or scam attempt. While no scripts were explicitly extracted, the document's structure and embedded URLs suggest it's designed to lead users to potentially harmful websites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8531

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/coin-master-codes-game-hack In PDF document text
    • http://ycstamping.com.tw/image/data/files/minecraft-creative-mode-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-offers_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-download_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-tiktok-username-and-password_GM835599320.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-link-no-verification-code_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/rewards-roblox_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-free-spins-facebook_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/bit-ly-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/hack-xp-net-coin-master_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/coin-master-34-6-hack_GM406889139.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://ycstamping.com.tw/image/data/files/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B9 27348 bytes
SHA-256: 9d7690919a0ad32fff378f18a3c01203dc261b0a9351c57e5428f666c9c0b7e9
font_01_sfnt_off00008748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8748 4332 bytes
SHA-256: fe89912b52beafd8b095076268fbd62a0049d8b4630a1fd6908ac9d80c3ae364
font_02_sfnt_off0000960b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x960B 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA930 17720 bytes
SHA-256: e3dc30cd69473f08b9483bb660e9aeaccc8f6f74c3e4f353697525059d592d8d
font_04_sfnt_off0000c9a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A1 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

Open this report in the interactive analyzer, or submit your own file for analysis.