Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1f620daa2d85bc5…

MALICIOUS

PDF

36.4 KB Created: 2021-05-21 01:17:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 00d3a14c0e94e98af9e39bfe6c003eda SHA-1: 8b0ba5696d7dd3a04cf1981e62298bde3636ffb7 SHA-256: c1f620daa2d85bc505bf757165603e2d5f9b763e7a6d3e322eb8208dc109b8f9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with game-related content, such as 'free generator / game hack'. The document body explicitly contains a call to action 'CLICK HERE TO ACCESS MINECRAFT GENERATOR' and points to a URL that is flagged as a malicious redirector. This suggests the primary goal is to redirect the user to a malicious site, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

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-images-free-game-hack In PDF document text
    • http://www.riverkennet.org/uploads/files/files/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/how-to-get-free-skins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/minecraft-diamond-finder-hack_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/minecraft-complete-handbook_GM479516143.pdfIn PDF document text
    • http://www.riverkennet.org/uploads/files/files/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.freenom.comHeyIn 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
font_00_sfnt_off00003715.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3715 24472 bytes
SHA-256: 37eca298a8c0a63feecd8f4f022cfe4d35a39c4b8b1948422aa99149c0a969a3
font_01_sfnt_off00006d9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9B 18116 bytes
SHA-256: 76604dd5740139514d3fd46c2a9d9c838f52c59b348f00b4ee9f07d20b77a693

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