Malicious PDF — malware analysis report

Static analysis result for SHA-256 51dd396811b048c6…

MALICIOUS

PDF

20.3 KB Created: 2021-05-20 16:04:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7adc52e86b9b848d9a5265a3f54b9468 SHA-1: b9daec02772c77af369ea983e5ffa3dd4e14be1b SHA-256: 51dd396811b048c65d96464c9ead5a7ad950802f597975e65b7de0d03a9d3ec3
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to external websites, including one identified as a malicious redirector. The document body and embedded links suggest a lure for free game-related content, such as 'Minecraft Skins' or 'Robux', which is a common tactic for phishing or malware distribution. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9184

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/479516143/minecraft-skins-download-free-game-hack In PDF document text
    • http://g3galileo.com/images/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://g3galileo.com/images/oprewards-free-robux_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/robux-com-free-robux_GM431946152.pdfIn PDF document text
    • http://g3galileo.com/images/coin-master-apk-hack-358_GM406889139.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003792.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3792 9009 bytes
SHA-256: fd0cc2b1ec4e66cb62d1593a35b1628dfaf915b9c65f56fc49d39b2b9203ae4b

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