Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1bc8478231a5fd…

MALICIOUS

PDF

37.7 KB Created: 2021-05-12 16:35:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 8094f2dfe683ffbd2f86c0dcdff5ea03 SHA-1: 3c9d2c5569f569fd08da0a1c8a775fdc57008065 SHA-256: 0f1bc8478231a5fd40f68d2f6d505a1c8316cce6631f93e15de073f6d4845783
70 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a clear call-to-action and an embedded URL pointing to known malicious redirector infrastructure. The document body text, though partially garbled, mentions "Huskybucks.com Free Robux" and "CLICK HERE TO ACCESS ROBLOX GENERATOR", indicating a phishing or scam lure. The heuristic firing 'PDF_MALICIOUS_REDIRECTOR_LINK' confirms the link leads to malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.0334

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://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000034b9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x34B9 26904 bytes
SHA-256: bce6b2ca217a02aa2d7232186e403da66416cf61f4e1ff3ec51393cd41252339
font_01_sfnt_off00007114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7114 18688 bytes
SHA-256: 6988f73f4b0746331af176c61d8a6d12afd54d9d4021c1ba8a7576897a1c52a2

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