Malicious PDF — malware analysis report

Static analysis result for SHA-256 a70523a7ab30d895…

MALICIOUS

PDF

36.4 KB Created: 2021-05-23 05:40:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: c6e2a7c72570ba270362f9f57988494d SHA-1: 0fb127c1dfa82ed71ffa4b18c68685abe3011e77 SHA-256: a70523a7ab30d8958cf1acdda5b6cce04eb7bd0222928663c792bf6fdb612899
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting a "free Robux generator" lure. The document body includes a clear call-to-action button, reinforcing the phishing attempt. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9492

Heuristics 3

  • 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/431946152/huskybucks.com-free-robux-game-hack In PDF document text
    • http://reggieslockandkey.com/images/robux-website_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/free-headless-head-roblox_GM431946152.pdfIn PDF document text
    • http://reggieslockandkey.com/images/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://reggieslockandkey.com/images/robux-free-promo-codes_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off000031af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31AF 25696 bytes
SHA-256: 6636c37aa43bf1b19a56d502efffebdd87cc957046976650ffeeb28a840ab710
font_01_sfnt_off00006bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFF 18688 bytes
SHA-256: 6988f73f4b0746331af176c61d8a6d12afd54d9d4021c1ba8a7576897a1c52a2

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