Malicious PDF — malware analysis report

Static analysis result for SHA-256 9978497339f79b6b…

MALICIOUS

PDF

30.9 KB Created: 2021-05-23 03:40:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c40030780bf66c5df798b760df04748c SHA-1: 280e1419d219043235acc3b93dd92339ca52cdf7 SHA-256: 9978497339f79b6b7d49db9684515b3a513e87ab7d32a427b6508848a675a6f8
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one identified as a malicious redirector, disguised as a 'free generator / game hack'. The document body and heuristics indicate a lure for free game currency, specifically Robux, which is a common phishing tactic. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9785

Heuristics 3

  • 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.
  • 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/431946152/how-to-get-free-robux-no-verification-game-hack In PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-packs-free_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://www.3d-gold.com.hk/upload/files/free-bedrock-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002fd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FD0 29060 bytes
SHA-256: 34347dd6a9f011f9f5e0a594570d90b393c1067b70a4f3585287eabfa9a46a04

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