Malicious PDF — malware analysis report

Static analysis result for SHA-256 e21b1f2127bc0e11…

MALICIOUS

PDF

33.1 KB Created: 2021-07-09 02:28:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 210593e3f747ad52e9b9f5b3d5a0ed54 SHA-1: 6a8e1766c2d5182640b4b233a33355b7ee14810e SHA-256: e21b1f2127bc0e111956df34c432c28230144ecf9cf74013b23e75d6f5b0b5ba
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, designed to lure users into downloading potentially unwanted or malicious content related to game hacks. The document body and embedded URLs strongly suggest a social engineering tactic to trick users into clicking through to a malicious site. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or scam attempt.

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/free-roblox-intros-game-hack In PDF document text
    • https://www.zagi.hr/files/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/free-roblox-injector_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/how-to-get-2021202120212021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://www.zagi.hr/files/counter-blox-roblox-offensive-wall-hacks-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://zagi.hr/files/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/aimbot-download-roblox_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.zagi.hr/files/how-to-hack-roblox-treasure-hunt-simulator-get-rebirth_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/500-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.zagi.hr/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://zagi.hr/files/minecraft-classic-free_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://zagi.hr/files/easy-robux-hack_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
font_00_sfnt_off00002bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2BCC 22044 bytes
SHA-256: 0af40e20bd25ee28fd45f94321388c218f089cf3e1c1e6084614601f2be97cdf
font_01_sfnt_off00005cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CC9 18752 bytes
SHA-256: 6bf376b09816765e402d515af924a62be3fa0c3e098cc2a2b1f733bb65ab6f85

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