Malicious PDF — malware analysis report

Static analysis result for SHA-256 63d4545e0d7e929b…

MALICIOUS

PDF

35.4 KB Created: 2021-05-13 11:09:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 5c39445117b78dd244d46ec091df5415 SHA-1: 2d441a7e5bceb59634669635a21cfd1dc33a6403 SHA-256: 63d4545e0d7e929beceb4a6a7c0c5667f78c2b331081ec23b4ac77369f3b7f5e
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure for a 'game hack generator' which links to known malicious redirector infrastructure. The embedded URL is designed to trick users into clicking, likely leading to a further malicious download or exploit. The document body text and heuristics confirm the malicious redirector and the lure for free spins.

Machine Learning

  • Nyx PDF Classifier clean score 0.0306

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-link-daily-get-free-spins--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_off000030e7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E7 24628 bytes
SHA-256: 7c37fbd1932004973e880b6dca3ec6029cfdc84f6b00881ba1c6177c5bb6f9b4
font_01_sfnt_off00006869.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6869 18476 bytes
SHA-256: c782d5e6373f7b618e30093e46bdd0ad9852ae556b34a7cf912e549ddbf001ac

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