Malicious PDF — malware analysis report

Static analysis result for SHA-256 032c23fd80645f8b…

MALICIOUS

PDF

41.1 KB Created: 2021-05-13 07:38:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 957a5cbaf21f449ac92c21ca8c2fa35f SHA-1: 0d7a805af682dced7d213427a877529fa2b26695 SHA-256: 032c23fd80645f8bf71b89597c57baeeb36499773a45e048672ad438f0220083
160 Risk Score

Malware Insights

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

The PDF contains embedded URLs and a visual download button lure, directing users to download a "Robux Earner" application. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of it being a malicious document designed for user deception. The primary IOC is the external URI pointing to a potential malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/robux-earner-game-hack In PDF document text
    • http://apx-centre.ru/images/coin-master-unlimited-spin-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/minecraft-hack-app_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/hack-coin-master-app_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-get-free-pets-in-adopt-me-roblox_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-generator_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/www-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://apx-centre.ru/images/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://apx-centre.ru/images/coin-master-code-for-free-spins_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://apx-centre.ru/images/how-to-hack-roblox-for-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_003_off00004702.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4702 24396 bytes
SHA-256: 8ed60c06b36b86fffdd0e4da0a1dacd4cea95cdcdc1518fa76af6a05c3a4cedc
font_01_sfnt_off00007ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7ED3 18076 bytes
SHA-256: f5a75b1f1fd7f518e5c7427b096eb9f92d711688fa0aea541fd532851a6f5025