Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b06f8bb8f122c7e…

MALICIOUS

PDF

36.8 KB Created: 2021-05-19 14:45:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f8587cea7530e267984ae89add1ef5e7 SHA-1: 4ff1e748c2e07ed603f6c227c4ab7159ef252c79 SHA-256: 1b06f8bb8f122c7e133fb4724e5dc5f76d12ec6fdd07c9d1e04df252c10cbf66
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded links that point to known malicious redirector infrastructure, specifically advertising a "free generator / game hack" for Coin Master. The document body also contains similar lures and the embedded URL. This indicates a phishing or scam attempt designed to redirect users to potentially harmful websites.

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/how-to-get-free-coins-on-coin-master-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_off00003650.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3650 24996 bytes
SHA-256: f89c82e55a3bb6ef8c2d8935cce1df99e4cb6c0e66ca7abe8c013cde0e7a5b33
font_01_sfnt_off00006fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD0 17872 bytes
SHA-256: 51f02da227d0679d4a4cca1b372203100e5a9ff6587b3c267ccf786d3222cbcf

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