Malicious PDF — malware analysis report

Static analysis result for SHA-256 93598d446542e78b…

MALICIOUS

PDF

36.0 KB Created: 2021-05-13 22:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 631de20b4a5fb6c9f87ea4448bbcd379 SHA-1: 41a94fb8e915795ec065a7826dee2a340ca2a764 SHA-256: 93598d446542e78b93ee637b94ee8510f6a9e5cd4b6bc466c7be268ca331a4b0
170 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains multiple heuristics indicating malicious intent, including links to known malicious redirectors and a fake CAPTCHA lure. The primary URL, 'https://netcdn.xyz/app/406889139/coin-master-hack-app-2021-game-hack', is associated with a 'free generator / game hack' lure, aiming to trick users into downloading potentially harmful software. The document's structure and embedded content suggest it's designed as a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0228

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 CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-hack-app-2021-game-hack In 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_off0000322c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x322C 25028 bytes
SHA-256: b749d64b4654f392e381def7b7fe22c082988518328e113b5d22a2479c2cb789
font_01_sfnt_off00006b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B29 18296 bytes
SHA-256: bf349ca5353405da50dde13ab4b8c776ba4b0a629ab8eb4a4600605684f4a994

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