Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ca847855351843b…

MALICIOUS

PDF

34.4 KB Created: 2021-05-21 22:43:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e9074b2986862313d23331332a6956b3 SHA-1: 772f882153e75d1ce25b86a5259fda3c35a9fcd6 SHA-256: 5ca847855351843bddfe9be6cff9b6eb70992b54128222ae59e43f149fb981e1
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to a known malicious redirector infrastructure, disguised as a 'free generator / game hack' lure. The document body explicitly mentions 'Free Spins Coin Master Unlimited' and 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the deceptive nature of the lure. While no scripts were directly extracted, the PDF's structure and embedded links strongly suggest an attempt to redirect the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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-unlimited-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_002_off00002e3e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E3E 23812 bytes
SHA-256: 87a685db1eb6498c5d4e22018f65343605fb2a03f31396a3e73b068fa888d672
font_01_sfnt_off00006483.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6483 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7

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