Malicious PDF — malware analysis report

Static analysis result for SHA-256 11f8d8a88e73cf29…

MALICIOUS

PDF

42.0 KB Created: 2021-05-11 13:32:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3b7293ed9f02c72d38d0c04aae122f05 SHA-1: 1821092b3cb7bfd45c2f1750e4764607b7d43c34 SHA-256: 11f8d8a88e73cf29e6091eec5100b0b5b0ffddfab668d2f2fddc7379e41b07f4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generator / game hack' lures. The ML classifier also strongly indicated maliciousness. The document body and embedded URLs suggest a social engineering tactic to trick users into visiting potentially harmful sites, likely to download further malware or engage in phishing.

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/apps-for-free-robux-game-hack In PDF document text
    • https://ase-sinaloa.gob.mx/images/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/is-windows-10-minecraft-free_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-vip-roblox_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master-apk_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master-tiradas-gratis-link_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-robux-master_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/how-to-get-free-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master-hack-online-no-human-verification_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/coin-master-hack-no-survey-or-verification_GM406889139.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/free-robux_GM431946152.pdfIn PDF document text
    • https://ase-sinaloa.gob.mx/images/roblox-games-with-free-vip-servers_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_off00004743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4743 25424 bytes
SHA-256: 198ad5458ab29f9d1a40aec23c606c2d76f6b636eeb54a14deca73888f8398c7
font_01_sfnt_off0000823c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x823C 18192 bytes
SHA-256: b6bed13222f637b3eaa93fd3412fcfb5f097d091c9d6b8306e759aa57a7fe68b

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