Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c31674f0390d03e…

MALICIOUS

PDF

44.6 KB Created: 2021-05-14 05:13:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1ce916ff9e659a9a81d3b32eba1eb491 SHA-1: fdb47df7a5d5b48851c47bc7af57360c2ff60118 SHA-256: 3c31674f0390d03e54f25e50ef5cb37a36d8e2b508a5d7004b307032175a2b46
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 also contains the same URL and a call-to-action phrase, reinforcing the lure. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to trick the user into visiting a malicious site, likely to download further malware.

Machine Learning

  • Nyx PDF Classifier clean score 0.0136

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/legit-coin-master-hack-october-2021-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_off0000367a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x367A 30116 bytes
SHA-256: 8af3ea249d5526cf1b440c46f0fdaf1ac444a2ec1950c69ee0ab0f1522d18c98
font_01_sfnt_off000077a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77A2 8676 bytes
SHA-256: e06aca5f85e50ae6cefda302c5299c18ab6d27c174f74f0bb0ee8efa7ccb4468
font_02_sfnt_off00008c2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2D 18564 bytes
SHA-256: 56b4f24fc9847ca249e337f5cec44192b38f8002a6131b91275db6b901cbab0a

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