Malicious PDF — malware analysis report

Static analysis result for SHA-256 b089e3560e1ab239…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 08:22:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 935647e760f1e3c44238a1f8e1a721ee SHA-1: cf86e0bfe764619e066cdf69267d85d296463653 SHA-256: b089e3560e1ab239863e2f2c786586c785463324859f333257cbbe0482e28876
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games. The document body also contains a prominent call to action to access a 'ROBUX GENERATOR'. This indicates a phishing or scam attempt designed to redirect users to potentially harmful websites. No scripts were extracted, but the embedded URLs and the nature of the lures strongly suggest a social engineering attack.

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.tw/app/431946152/earnrobux-game-hack In PDF document text
    • https://tena-g.hr/files/coin-master-spin-link-today_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/best-free-roblox-explits_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/coin-master-free-codes_GM406889139.pdfIn PDF document text
    • https://www.tena-g.hr/files/how-to-get-minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/free-free-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-hacks-for-iphone_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • https://tena-g.hr/files/roblox-hack-to-get-free-robux-youtube-voltexx_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/pubg-uc-generator-without-human-verification_GM1330123889.pdfIn PDF document text
    • https://tena-g.hr/files/_GM479516143.pdfIn PDF document text
    • https://www.tena-g.hr/files/roblox-hack-day_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-accounts-to-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • https://tena-g.hr/files/funbloxxyz-free-robux_GM431946152.pdfIn PDF document text
    • https://www.tena-g.hr/files/block-best-robux_GM431946152.pdfIn PDF document text
    • https://tena-g.hr/files/free-minecraft-thumbnails_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
font_00_sfnt_off00002e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3F 22768 bytes
SHA-256: 820b72448a4133efcda41a2ccc267b78004a3c7e06144128a5d84af22ad687c7
font_01_sfnt_off000060ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60FF 18552 bytes
SHA-256: 6794fc7ee49cdd0a33f98bbbc8a763353555002210e507bd98e2a39f67d6f290