Malicious PDF — malware analysis report

Static analysis result for SHA-256 da5d37f553e31e6c…

MALICIOUS

PDF

48.2 KB Created: 2021-05-12 22:35:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 717a852aa3f12ce9cea69b308372daf6 SHA-1: 77b5d406d6e99d700a8f7f652e26743ba581f3af SHA-256: da5d37f553e31e6c3f02116f9eb7b4cef233e1331d2554025a3adfe9c69719f2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that redirect to known malicious infrastructure, specifically advertising a "game hack" or "free generator". The document body also contains the phrase "CLICK HERE TO ACCESS COIN MASTER GENERATOR", reinforcing the lure. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.0145

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/coinmasterfreespinlink-game-hack In 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_off000032a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32A5 25828 bytes
SHA-256: e18eae095aa8fa90794dac4e814099be4fd031948b176f9b9037d4c1cbdd1e02
font_01_sfnt_off00006edf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EDF 3088 bytes
SHA-256: e7854aff7cbc8fbdeb85d2b3d6248d12dc820ede8a581f4eac107fa6446c2222
font_02_sfnt_off000079aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79AA 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off00008cd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CD0 18224 bytes
SHA-256: 5ac1ce2ac88e7b98134a23e8a83b406c8e40c127b2dbab09a4edbea00c7c47cb
font_04_sfnt_off0000ae83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE83 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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