Malicious PDF — malware analysis report

Static analysis result for SHA-256 5dd6f2755a2bfdd0…

MALICIOUS

PDF

35.7 KB Created: 2021-05-13 20:06:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 946b4215afb87a5cb773d3e5c4a23692 SHA-1: dc59794718ac95856c8e00748bcf3495f1ed08a5 SHA-256: 5dd6f2755a2bfdd0f7da9eed4a6dbec515d1f64b58b8c3000a5f324ff1bfb866
130 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a "Coin Master Daily Free Spins" generator hack, a common lure for phishing and malware distribution. The heuristic firings indicate the PDF links to known malicious redirector infrastructure. While no scripts were extracted, the document body and heuristics suggest a social engineering attack aiming to trick users into visiting a malicious URL, likely to download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-daily-free-spins-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_off00003253.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3253 24332 bytes
SHA-256: 83925cc62ebd4b6092cb75577f4ce7abf19b42885f5c5d8b4f40e520d1006b9c
font_01_sfnt_off000069f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 18308 bytes
SHA-256: e42bde5f0ce420544e36e42831a39ceefa2103814e02a0c87b67b282abd28734

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