Malicious PDF — malware analysis report

Static analysis result for SHA-256 b047bfe1157f1f34…

MALICIOUS

PDF

32.4 KB Created: 2021-07-19 14:10:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: e0b9a9cafe51c02fc93b726e8b5a17c0 SHA-1: 7bd041092c9c7bc345e22bde60024a810114ce2c SHA-256: b047bfe1157f1f3424786bcda21e8fc55d3f96d65f9261d751676f41b8370edd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and infrastructure, disguised as offers for free game currency or hacks. The document body and embedded links explicitly mention 'Free Robux' and 'game hack' lures, aiming to trick users into visiting these malicious sites. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9452

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 http://netcdn.tw/app/431946152/free-robux-no-verification-2021-ios-game-hack In PDF document text
    • http://daksz.hu/images/minecraft-tiktok-hacks_GM479516143.pdfIn PDF document text
    • http://daksz.hu/images/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://daksz.hu/images/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://daksz.hu/images/buy-robux-free_GM431946152.pdfIn PDF document text
    • http://daksz.hu/images/how-to-get-minecraft-java-edition-for-free_GM479516143.pdfIn 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_off00002668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2668 22944 bytes
SHA-256: abd953ee14dd4983c150d8e7f5bd666040f951f79576534e90a3d2404a89e008
font_01_sfnt_off00005a28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A28 19188 bytes
SHA-256: ec4c473d5834925599144b93a33ad6ee3064c9078267c878f28702a8d76031d6

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