Malicious PDF — malware analysis report

Static analysis result for SHA-256 123e3d7cedfb5f49…

MALICIOUS

PDF

38.7 KB Created: 2021-05-11 00:36:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 4efe79476a9114d6b021cce9e39b1c97 SHA-1: 93504b22bc2b637205fe872771e236bf39c03203 SHA-256: 123e3d7cedfb5f497c1f6b71a79820de39bc6641860cc3742bd3d1aec9c00037
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a redirector link that leads to a 'game hack' lure. The embedded URL, https://netcdn.xyz/app/406889139/coin-master-free-spin-download-game-hack, is identified as a malicious redirector. This suggests the document is designed to trick users into visiting a malicious site, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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-free-spin-download-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_off0000350b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x350B 26704 bytes
SHA-256: 38e1e5ba8e17f60b199d8e1a2a93c31f09b9837144e41e345e2c51ded3a63bb3
font_01_sfnt_off000072b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72B6 19384 bytes
SHA-256: 8d84ff3e96e9e3fc87f385c105efcb4357bb904d9f9db8a0b4ac207a1e86a897

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