Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e6adb9f9941261…

MALICIOUS

PDF

35.3 KB Created: 2021-05-20 22:11:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4e3647856879c558f0809c90f2cd3f7b SHA-1: e3040779e0cddc09c3fb39ea31c74cddb39d9495 SHA-256: e3e6adb9f99412612cf03417468699b5b1bfcaf6ff110e68ae3a9c49bd2f5f32
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, masquerading as game hack generators. The primary lure, 'free-spins-for-coin-master-2021-game-hack', is hosted on a known malicious redirector. The document's structure and embedded links strongly suggest a phishing or social engineering attack aimed at redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9508

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/free-spins-for-coin-master-2021-game-hack In PDF document text
    • http://atmos-service.com/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • http://atmos-service.com/images/free-roblox-generator-for-roblox_GM431946152.pdfIn PDF document text
    • http://atmos-service.com/images/free-spin-hack-coin-master-2021_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_002_off000030e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E3 24828 bytes
SHA-256: edf57732fa16fc87144800103ce588156e6dda7e26378509b3aa1f736d35c412
font_01_sfnt_off000068aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68AA 18288 bytes
SHA-256: 66febbde5b4b2b6a44609229e8681f3f0581fff3ed5f82ed8e3d83342858c217

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