Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9be5c0b9837d36…

MALICIOUS

PDF

36.7 KB Created: 2021-05-15 05:30:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 40815096289312884f222ca78cc62a5c SHA-1: 126d09894a6e743e71e785fb9181e50b851f729c SHA-256: 8b9be5c0b9837d3656b8b0b82883979d3d1954546676f2fd2274910ef78fca84
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a malicious link disguised as a lure for 'free spins' and a 'coin master hack'. This link redirects to known malicious infrastructure, indicating an attempt to trick the user into downloading a potentially harmful payload. The document body and heuristics confirm the presence of a redirector link and a download lure.

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/free-spins-coin-master-hack-2021-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000033f3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33F3 25416 bytes
SHA-256: f18e62b0ba3425ec02b5a7df3b0054e658bd281f1a465a45f0d9c476d682a7f7
font_01_sfnt_off00006dbb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBB 18456 bytes
SHA-256: 8f74d6ddd2abce9f563610cbfcc253ce51c057807514da134dc64dcb58b7111e

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