Malicious PDF — malware analysis report

Static analysis result for SHA-256 43483e57bc539b65…

MALICIOUS

PDF

44.1 KB Created: 2021-05-16 13:15:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c430c23b721ba04c10a1918a8c261cc9 SHA-1: 1177e490e3d122787d196326918859dc4e901639 SHA-256: 43483e57bc539b65d36d5ea6f2d78c02375f5cdd751679ae8cec55be72cbaa3d
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document employs a lure related to "Free Robux Rewards" and impersonates PayPal to trick users into clicking malicious links. These links, such as https://netcdn.xyz/app/431946152/free-robux-rewards-game-hack, lead to known malicious redirectors. The document's structure and embedded URLs suggest it's designed to facilitate initial access via social engineering, likely leading to further malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/431946152/free-robux-rewards-game-hack.
  • 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-rewards-game-hack In PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-34-4-hack_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/how-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/how-to-make-robux_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-hack-september-2021_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-hack-apk-link_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/daily-free-spin-coin-master-link_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/free-coin-master-spins-blogger_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/free-robux-website_GM431946152.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/hack-to-protect-village-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lichtdrukkerijwijchen.nl/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.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_off00004c44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C44 27884 bytes
SHA-256: 781814ca500a94f930e0057559ca493dc89d286a6458c0b133a82c8422c77bd6
font_01_sfnt_off00008922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8922 18580 bytes
SHA-256: f6e5d240c50f73aa936fa09c98082d3b637660329d811c3f0d463ac63f7ff7de

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