Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8a1ad683da80969…

MALICIOUS

PDF

37.6 KB Created: 2021-05-12 06:00:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: f17cd237396874f59bfb9afe1b5a0c35 SHA-1: ea83f2be8081e2910d7c15187ea3367fce65179a SHA-256: a8a1ad683da80969e34fcf32920d1bf324a3967b5ea753c46e015ef1d398d92e
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 it is the primary mechanism for user interaction. The embedded URL is likely intended to lead the user to a site that will attempt to exploit them or deliver further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0130

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/406889139/60-free-spins-coin-master-game-hack In PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000030f5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30F5 24404 bytes
SHA-256: 1f8db1748644023a2e0d57a9e6e9afe4a007401f9e2173e0f9cc7ee6f09f6b99
font_01_sfnt_off000067c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x67C5 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007177.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7177 18224 bytes
SHA-256: c1ecca62003467cdf8c5fbac224d7e39febf20c3e1f0cb28698ef381036d4826

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