Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f9b5912c5a0118…

MALICIOUS

PDF

37.0 KB Created: 2021-05-10 22:34:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 784ef79a60a96c32a41921584b42e135 SHA-1: 6c558abdb4606e66243f0054a5a292d04e2fd378 SHA-256: 19f9b5912c5a01182e3dd58add5979446e2cdabd9dee7affc5f0cb8752bdf201
130 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically advertising a 'free generator / game hack' for Minecraft. The document body also contains a prominent call-to-action to 'CLICK HERE TO ACCESS MINECRAFT GENERATOR'. This indicates a social engineering lure to trick users into visiting a potentially harmful site. The presence of embedded URLs and the nature of the lure strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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/479516143/minecraft-client-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_off00003435.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3435 26432 bytes
SHA-256: dc30375daf627bde97807c39047ddd3ba8f9479488b411417de6e6b6e0ece74b
font_01_sfnt_off00006f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F37 18292 bytes
SHA-256: df528b26126d4fc11b7eeaa3b1f911f76ffca14ff52ae065bc56290066d0d251

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