Malicious PDF — malware analysis report

Static analysis result for SHA-256 71f07ee39907bf95…

MALICIOUS

PDF

38.1 KB Created: 2021-05-25 07:30:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 48ef4322019021a1d16147f343aaf4b7 SHA-1: 8d493cd8dad742af0bd110b8e6659296ee73b3eb SHA-256: 71f07ee39907bf95c78faed8847aa8d0333390a5529eddfdad02858364c6e900
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a prominent link to a site offering free Robux, flagged as a malicious redirector. The document body also contains similar lures and multiple URLs pointing to potentially malicious content. The presence of a visual download button heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9407

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/robux-match.com-free-robux-game-hack In PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://bookswithapast.com/ckfinder/userfiles/files/free-spins-coin-master-unlimited_GM406889139.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_off00003669.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3669 26436 bytes
SHA-256: 6c259a9b411bb3a9e9640ea0e7d6b85a210e714d9d23a49d10bf78bc23e138a1
font_01_sfnt_off000071f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F9 18904 bytes
SHA-256: 4a85ad6ffc73ad9b3f41fceca22de32e3ce7595015d69f53ae753139e52ac9f7

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