Malicious PDF — malware analysis report

Static analysis result for SHA-256 03833b1d655ab18c…

MALICIOUS

PDF

40.9 KB Created: 2021-05-19 04:02:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a9fde7dc2ffed3305c7a04242dfe680d SHA-1: c7d5e9b4f8cafddf3e0925b64272bb67d70ada90 SHA-256: 03833b1d655ab18c8350aca7377f7dac45e90d9f0dabe492c87cc3e74d1b68f2
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a prominent call-to-action button and embedded text promoting a 'free Robux' generator, which is a common lure for phishing and malware distribution. The critical heuristic firing indicates that the document contains a link to known malicious redirector infrastructure, specifically pointing to `https://netcdn.xyz/app/431946152/huskybus.com-free-robux-game-hack`. This URL is likely used to deliver a second-stage payload or redirect the user to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier clean score 0.0125

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/huskybus.com-free-robux-game-hack In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003086.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3086 27404 bytes
SHA-256: a422fbfcc27bac7307c4376b579218723fbdab1e4e8408941d97d74e43bae094
font_01_sfnt_off00007044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7044 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off00007d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D55 18688 bytes
SHA-256: 6add98f93d6464e4673e157e466f8eac90a499b9ef5784f234ada041ea0169f0

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