Malicious PDF — malware analysis report

Static analysis result for SHA-256 a73373efc4e92d30…

MALICIOUS

PDF

43.3 KB Created: 2021-05-16 06:18:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 97356244b78b8a9867a4b6ad8539fa7d SHA-1: b7e5e3c9a857e2abec5a77a9630dfa385afdd7b6 SHA-256: a73373efc4e92d306b3a4bb215eab25c280a77dd0dbb546478053afbcca10ca3
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux'. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains references to 'Robuxlove .net' and the malicious URL, reinforcing the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/robuxlove-.net-free-robux-game-hack In PDF document text
    • http://mohacad.com/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-robux-just-click_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/2021-roblox_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/easy-points-gg_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/moonactive-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/play-coin-master-online-free_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-daily-free-spins-link-today-blog_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/free-coin-spin-daily-link-coin-master_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://mohacad.com/images/haktuts-free-spins_GM406889139.pdfIn PDF document text
    • http://mohacad.com/images/coin-master-hack-apk-free-download_GM406889139.pdfIn 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_off00004830.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4830 26980 bytes
SHA-256: da1beac0c24e092f3ab516ef6b1884f9acaf6a5de27a1ddcda67af6efd7ecee6
font_01_sfnt_off0000867b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x867B 18372 bytes
SHA-256: 65db4e182113fd1a8aa6d8046ef53f92d54fa7b6a505b130f920b75136a01eb1

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