Malicious PDF — malware analysis report

Static analysis result for SHA-256 c93410256a7a825a…

MALICIOUS

PDF

31.8 KB Created: 2021-06-19 19:39:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 56e44be75a32292a3fa77324533947a8 SHA-1: ae4585f18b67eb557413f7a571da692a821f3b4e SHA-256: c93410256a7a825aef9a3aaa33eafbde5455d4c2be348646e2dd2ab7a001b2d1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector at http://netcdn.co/app/431946152/how-to-get-free-robux-now-game-hack, disguised as a 'game hack' lure. The document body reinforces this by mentioning 'How To Get Free Robux Now' and 'ROBUX GENERATOR'. This indicates a phishing or scam attempt designed to trick users into visiting malicious sites. No scripts were extracted, but the embedded URLs and the nature of the lure strongly suggest a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • 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.co/app/431946152/how-to-get-free-robux-now-game-hack In PDF document text
    • https://www.audev.com/images/how-to-get-free-spins-and-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/how-to-get-free-robux-on-computer_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/da-hood-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://audev.com/images/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • https://audev.com/images/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://audev.com/images/how-to-get-free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/robuxin-robux-hack_GM431946152.pdfIn PDF document text
    • https://audev.com/images/free-texture-packs-for-minecraft-pe_GM479516143.pdfIn PDF document text
    • https://audev.com/images/free-robux-no-inspect-or-waiting_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/114-4-hacks_GM479516143.pdfIn PDF document text
    • https://audev.com/images/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • https://audev.com/images/robux-free-online_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/roblox-how-to-play-welcome-to-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • https://www.audev.com/images/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • https://www.audev.com/images/free-robux-link_GM431946152.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
font_00_sfnt_off0000289b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x289B 21460 bytes
SHA-256: 15252646e622d592c30904cc62ec5f8324c3839934bcaebf4f324e52978ae05c
font_01_sfnt_off0000574f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x574F 18984 bytes
SHA-256: 0df7a694d076369ecb8e215c54a140684970b3c807295a501f698762459b84eb

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