Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d5cf67da94a2f09…

MALICIOUS

PDF

39.1 KB Created: 2021-05-17 12:03:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 2cf0c034c8c714a333da0811afc6abeb SHA-1: 65d543391cca3106fd67a5bf1a758ed4f6636ee1 SHA-256: 4d5cf67da94a2f090411833035a4f4e1a676c2d8c470a88d7406e633c15616a7
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically a "coin master free coins and spins link game hack". The document body also contains a call to action to "CLICK HERE TO ACCESS COIN MASTER GENERATOR". This indicates a social engineering lure designed to trick users into visiting a potentially harmful website.

Machine Learning

  • Nyx PDF Classifier clean score 0.0127

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-and-spins-link-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_off000034e5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34E5 24496 bytes
SHA-256: c4f9bdd4394437487df892f780da26260689b3b85919aefd8bf519d3bb99a341
font_01_sfnt_off00006d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D5A 2924 bytes
SHA-256: 89b375b3099c16285f8fe3c63d3b9e52cb99b52dd2caab822764707661633145
font_02_sfnt_off0000776e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x776E 18228 bytes
SHA-256: b9853edf503a53d442d3b577c09c09d59d7c57f52c57bf669c9991918f7be207

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