Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5f8ccc6d8b2dc07…

MALICIOUS

PDF

32.5 KB Created: 2021-07-19 10:22:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 9ec7814b04e710d230a50f97f9818c2a SHA-1: 2e1e09964b6eaa1c9295e377748025fc0f0ac986 SHA-256: a5f8ccc6d8b2dc07075dbe669eed0a5b6e4cdd44a26a922f88c2be66b07d3188
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to scam websites, specifically advertising "robux hack generators" and similar lures. The heuristic findings indicate these links point to known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to trick users into visiting malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9532

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/robux-hack-generator-game-hack In PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.wrlshipping.com/uploaded_files/userfiles/files/tiktok-minecraft-hacks_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_off00002977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2977 22656 bytes
SHA-256: baba819ae03917dfbc6ac750bf9eae84120a3ae71df5ae4b7872b4b771d16fd7
font_01_sfnt_off00005c10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C10 18540 bytes
SHA-256: db8edbbd538aca18e05b99cd54861677296d935b4e27b3111fe375c1a3adc534

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