Malicious PDF — malware analysis report

Static analysis result for SHA-256 8915f938dcc2d615…

MALICIOUS

PDF

41.5 KB Created: 2021-05-17 11:10:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 67a2894b4ffd6ce3f3fed0ec6cd85af6 SHA-1: 32c0470066e461467fdaa7ff4c37ab3028d778bb SHA-256: 8915f938dcc2d615840252b56fe0e2842ff3c53ad24fc0ce99c86427d5c4d934
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game hack generators, indicating a lure-based attack. The ML classifier strongly flagged this PDF as malicious. The embedded URLs likely lead to further stages of infection, such as downloading additional payloads or directing users to phishing sites.

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/oprewards-login-game-hack In PDF document text
    • http://immo360grad.com/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hacked-apk-download-for-android_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/como-hackear-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-marketplace-free_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-online-free-no-download_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/free-realistic-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-group-roblox_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://immo360grad.com/images/minecraft-free-minecoins_GM479516143.pdfIn PDF document text
    • http://immo360grad.com/images/www-bandicam-com-free-robux_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://immo360grad.com/images/how-to-get-free-roblox-gift-cards_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_off000045c1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x45C1 24720 bytes
SHA-256: 39fa0d4e2b9e66cda8601457cddcafa07cb326b6a81743bffd2fc455cac9de82
font_01_sfnt_off00007ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EE4 18492 bytes
SHA-256: 81eae8079694c842f573892a7bdeb7507755234d7d643456fdd469df9fa7c23d

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