Malicious PDF — malware analysis report

Static analysis result for SHA-256 d186e10a24f34554…

MALICIOUS

PDF

35.4 KB Created: 2021-07-20 23:42:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 05488dcefadde6034e6e9ef087385e94 SHA-1: b10783f6a022ad0c93811073815ce48392208484 SHA-256: d186e10a24f345545d578abeebd738b274724b140f22e6bab95842ef7d4245cf
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure, specifically http://netcdn.tw/app/431946152/robux-match.com-free-robux-game-hack. The document body and embedded links also point to lures for free Robux and game-related items, suggesting a phishing or scam attempt. The ML classifier also flagged this PDF with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 http://netcdn.tw/app/431946152/robux-match.com-free-robux-game-hack In PDF document text
    • http://www.akvamaster.com.ua/images/can-you-play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/coin-master-free-spins-and-coins-daily_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-tiktok-followers-no-human-verification-or-survey-2021_GM835599320.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-robux-obby_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.akvamaster.com.ua/images/coin-master-free-spins-link-today-instagram_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
font_00_sfnt_off00003205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3205 23316 bytes
SHA-256: bc7f19743ea53cf6a1f4e3929e5fcb5316bd63b8aab7b860ff36930ae0be8f21
font_01_sfnt_off0000664d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x664D 19092 bytes
SHA-256: 13625695963a426473cdec0e2122eae6fd4ea6201280efa968dfc6869c64504c

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