Malicious PDF — malware analysis report

Static analysis result for SHA-256 a89519bc554ffdc2…

MALICIOUS

PDF

41.0 KB Created: 2021-05-14 00:30:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5565dc121fe0bb248b4d9cff0860e62 SHA-1: aac2d87206f337d904fd1a89618d59f13819830e SHA-256: a89519bc554ffdc2013a275ea0ebd482a8b8f264d58c84f18da549efb28583dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free Robux and game hacks to entice users. It contains multiple embedded URLs that redirect to malicious infrastructure, specifically identified as a known redirector. The document body and heuristics indicate a social engineering tactic to drive users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 https://netcdn.xyz/app/431946152/free-robux-discord-servers-game-hack In PDF document text
    • http://aessentia.com/images/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-wheel_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-hacking-news_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/instant-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-free-stars_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-free-spin-facebook-link_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://aessentia.com/images/hack-robux_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-rewards_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-link_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-coin-master-androd-cheats-2021_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/free-robux-generator-2021-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://aessentia.com/images/minecraft-mac-free_GM479516143.pdfIn PDF document text
    • http://aessentia.com/images/roblox-pink-free-robux_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
stream_002_off0000436e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x436E 25012 bytes
SHA-256: c83e34e8b3bc85100fc74142544c84af9f1ada47c00e44d3348d763f9ca08dc9
font_01_sfnt_off00007d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D4A 18588 bytes
SHA-256: 987077e7e16e583019f60132f52646f266da53a12ca0a8940473eab7507416ca

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