Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3fcdeae681deba…

MALICIOUS

PDF

46.8 KB Created: 2021-05-14 03:00:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a1b4efa65945ac6b630998ee3dc8aac0 SHA-1: 53140c1cf87c230b064ce36dfb3d29b4937e075a SHA-256: 6a3fcdeae681deba5daa32defbb7f8086cc729fc07ae04102b9d49653396ef48
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to known malicious redirector infrastructure, specifically pointing to a lure for 'free Robux'. The ML classifier also flagged this PDF as malicious. The presence of embedded URLs and a visual download button lure suggests a phishing or scam attempt designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/robuxglobal.com-game-hack In PDF document text
    • http://cornerstonedurham.com/images/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-coins-and-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-hack-review_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-hack-coin-master-game-without-root_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/moonactive-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-mster-free_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/coin-master-hack-android-no-root_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/best-hack-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-robux-hack_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-coin-and-spin-for-coin-master_GM406889139.pdfIn PDF document text
    • http://cornerstonedurham.com/images/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://cornerstonedurham.com/images/roblox-hack-generator_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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048c9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48C9 26224 bytes
SHA-256: 2298ac8231dd4e9061a9e5c1565844930edf634790d83b281c27a4bfb821e8b1
font_01_sfnt_off00008629.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8629 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off000092d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92D1 18764 bytes
SHA-256: 59fb30c80e85498b2f7c5a4d05a5dec781d28c8684b6c7c45546c982bbf76575

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