Malicious PDF — malware analysis report

Static analysis result for SHA-256 98d3b082b50d33f5…

MALICIOUS

PDF

35.9 KB Created: 2021-05-13 16:47:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: b853a22364f8990f2ec24b66ce8eebe3 SHA-1: a64c56fd942b587a6430f57118868f97125ffbc3 SHA-256: 98d3b082b50d33f5cf53329add0c70220b4351ac4bbb56616f94c6782da3c284
130 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically a URL associated with a 'free generator / game hack' lure. The document body also contains explicit calls to action like 'CLICK HERE TO ACCESS COIN MASTER GENERATOR', reinforcing the social engineering aspect. While no scripts were directly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0265

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-spin-coin-master-link-download-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_off0000325e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x325E 24616 bytes
SHA-256: 6bb90e499a7f1078ef7973bbed4153026b6b50c64b57af2c479496e0fe41ba87
font_01_sfnt_off000069c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69C6 18636 bytes
SHA-256: 136b79965a5248ac6e7935dc786215b4277752963c3c0798ae07969220183c9d

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