Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2fbb7c690cc8c0…

MALICIOUS

PDF

36.5 KB Created: 2021-05-15 17:33:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 50d4d2575aec19fe58a7645ec9b797d5 SHA-1: 880c89bd71baf67e2681319082f223e974cf30fb SHA-256: 8e2fbb7c690cc8c0eab7db0f122c39c9266e6eee79bd31083801add236922a41
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a redirector link to a "free generator / game hack" lure. The embedded URL, https://netcdn.xyz/app/406889139/coin-spin-game-hack, is associated with malicious redirector infrastructure. The document body also contains text related to "Coin Spin" and a call to action, reinforcing the lure. While no scripts were explicitly extracted, the nature of the redirector suggests it likely leads to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0292

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-spin-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_off000032b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32B9 28196 bytes
SHA-256: bd5fd8ef89cb9bc5e5b67366d9e07cc8da3a9de0fa9b2dc3791ba947380a78a8
font_01_sfnt_off0000701f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x701F 17392 bytes
SHA-256: 26961c9f14d61c789be320ef33f793128d7856b3f2b2e22dee8a483f9b6c2997

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