Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf056b4b924fed30…

MALICIOUS

PDF

36.7 KB Created: 2021-05-17 00:31:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: afa7ae4be5e77877ac98fcc19ecc149f SHA-1: 3bc5af23598c8ed388df22fd96e939dfee8aa6df SHA-256: bf056b4b924fed3093ae0703c34cc34e2dd0c9505a492358f538342c4a4ebc41
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users with promises of game hacks or generators. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-spin-link-app-game-hack, is flagged as malicious and part of a redirector chain. The document body also contains explicit calls to action like 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0312

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-free-spin-link-app-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_off0000364d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x364D 24588 bytes
SHA-256: 02cffa81d71bc78bcf13a8f366b52e1fe829e9cd13adcad1424587172c943b8d
font_01_sfnt_off00006eb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EB0 18056 bytes
SHA-256: 82bd5e5fc9f9c8e10db102fb3f3c15aafc022ab197dd07e70821ea88e25dcd6f

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