Malicious PDF — malware analysis report

Static analysis result for SHA-256 03524ebe381f9a9e…

MALICIOUS

PDF

35.4 KB Created: 2021-06-26 02:59:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cc63cfaa5eb407d5a4abec42745c2bdd SHA-1: 6b28a8f96b8b4ded3af7a75956239e697b0304a6 SHA-256: 03524ebe381f9a9ee9437dcd0af27e77814ecee61e5083dc5312cbb820c42fee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for free game currency ('Robux') and hacks, directing users to a known malicious redirector. The ML classifier strongly indicates maliciousness. The embedded URL is the primary indicator of compromise, likely leading to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-no-generater-game-hack In PDF document text
    • https://www.vista-design.hr/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-get-a-free-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • https://www.vista-design.hr/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/robux-hack-may-2021-no-survey_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-rewards-robux_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-get-minecraft-for-free-on-ps4-2021_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-make-a-private-server-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/coin-master-hack-android-2021_GM406889139.pdfIn PDF document text
    • https://www.vista-design.hr/files/minecraft-xbox-360-free_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/glitchtale-battle-of-souls-roblox-hack-jult-31-2021_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/roblox-working-strucid-aimbot-hack-2021-agust_GM431946152.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://www.vista-design.hr/files/how-to-get-more-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.vista-design.hr/files/download-roblox-player-exe-free_GM431946152.pdfIn PDF document text
    • https://www.vista-design.hr/files/free-spins-coin-master-links-2021_GM406889139.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_off0000335d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x335D 22496 bytes
SHA-256: 9b3c561ceeccd4a598c5f97b62247d6c9c6a40437c00116bbbbe4b8450423ce6
font_01_sfnt_off00006582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6582 18984 bytes
SHA-256: fb89b86eca57d35ca4d1d382d19ebaf44641027c24fd3c0b8c76aedbfa874dab

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