Malicious PDF — malware analysis report

Static analysis result for SHA-256 8efc65f352ed2630…

MALICIOUS

PDF

36.6 KB Created: 2021-05-18 05:15:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 5026667fa27326a09eddcc4bda986efc SHA-1: 60668b5b3310c3723c0dff4b0a6d1f323b9ab187 SHA-256: 8efc65f352ed2630a2629507831c7c55c9091d062bd0705dc7f89c7c7f1c97be
130 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links pointing to known malicious redirector infrastructure, specifically advertising a 'Coin Master Free Spins Link' and 'generator'. The document body also contains a call-to-action phrase, reinforcing the lure. The primary malicious URL identified is https://netcdn.xyz/app/406889139/moonactive-coin-master-free-spins-link-game-hack, which is flagged as a malicious redirector. This suggests the document's purpose is to trick users into visiting this malicious site, likely leading to further malware downloads or phishing attempts.

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/moonactive-coin-master-free-spins-link-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_off000035c0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x35C0 24600 bytes
SHA-256: c4dba79aaa1a9d2ee38eebc86a9e0ff5955193f6b966d4468b11cbd58d589500
font_01_sfnt_off00006deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DEB 18168 bytes
SHA-256: 5140a57a6990af64b86c6fc328de463115c3f290c56e1373822c3feaa5dc4a97

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