Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a8612e1f4da4e92…

MALICIOUS

PDF

39.0 KB Created: 2021-05-15 23:04:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: be1206d487b41b5b14daeeeb263c2bd2 SHA-1: b19633a7c060b0af4e96f67adf9af774d2ed2880 SHA-256: 7a8612e1f4da4e927534281578f695519d1cf70bc91a0a4098551714500bd3e6
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple heuristics indicating it is a malicious redirector lure, specifically targeting users with promises of game hacks and free spins. The embedded URL, https://netcdn.xyz/app/406889139/free-spins-for-coin-master-hack-game-hack, is identified as a known malicious redirector. The document body and metadata confirm the lure's theme and the application used to generate the PDF.

Machine Learning

  • Nyx PDF Classifier clean score 0.0128

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/free-spins-for-coin-master-hack-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_off0000354f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x354F 24504 bytes
SHA-256: 099d61f8aa54dcfc725ed85d05d944481811e89a3f9b37d519fce47d46f16dde
font_01_sfnt_off00006db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB2 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off0000779d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x779D 18056 bytes
SHA-256: 3401c90f9da97577ae440e5622d1e8fed8a056e7e09ad8fa85d1e768b8d8a9bf

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