Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f33b0fca1fecc9…

MALICIOUS

PDF

37.0 KB Created: 2021-05-23 11:21:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 503bacf6c9842dc2b938849ad0ee29b9 SHA-1: 6c4950c067c9db0db60f43eae78d160beb7704aa SHA-256: 03f33b0fca1fecc9216ad30d090fea91eb21c211bcff82d2f9a7f74c9eeab7e2
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple critical heuristic firings indicating it links to malicious redirector infrastructure, specifically for a "game hack" lure. The embedded URL `https://netcdn.xyz/app/406889139/coin-master-free-coins-game-hack` is the primary indicator of this malicious redirection. While no scripts were explicitly extracted, the PDF structure and the nature of the lure suggest an attempt to drive users to a potentially malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.0076

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-coins-game-hack In PDF document text
    • https://coinmasterspinandcoin.comIn 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_002_off00002e4c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2E4C 25080 bytes
SHA-256: a6697d124c1044a303554675695ba7ee68cee251d55c562947f8f19f90d1b4d1
font_01_sfnt_off0000676f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x676F 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00007121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7121 17712 bytes
SHA-256: 0afd6f2792edb83b7f2a0201a1e0a5eb12ca81ad868fb3e42742340ee6e5fb0e

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