Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a9d2abbddf8d273…

MALICIOUS

PDF

36.3 KB Created: 2021-05-16 11:17:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 48ee41c80b87a7498e8fd69b7f435df1 SHA-1: 0a8fbd97038570773697b22f6d7680454bd8cccf SHA-256: 8a9d2abbddf8d273275ccc3bc8d0581cd774ca8fdab74e9afd0bd6560396c17b
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious URL. The document body and embedded artifacts also contain references to this URL, suggesting the primary purpose is to redirect users to a potentially harmful site. No scripts were extracted, but the presence of embedded URLs and redirector links strongly indicates a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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-rewards-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_off000033c4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x33C4 24868 bytes
SHA-256: 48575f7f09a26a56c4b0d95fc9f3f6568f7d91a5991f5d83e99088a039dc5a6b
font_01_sfnt_off00006c72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C72 18308 bytes
SHA-256: 56c9764dfe9b7751766473bcf998f7f39304bff1cf37f7eb72c18d79890b8eac

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