Malicious PDF — malware analysis report

Static analysis result for SHA-256 266ea370cbf96897…

MALICIOUS

PDF

34.3 KB Created: 2021-06-20 05:36:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: e7ee65fba1c7c62ef7639a6e1f953b36 SHA-1: c8ad06a669f63ca953ed0c4029227bd36855075e SHA-256: 266ea370cbf96897ea735d5e1c8be9fd5760b6d29e88f1eb4e8e2a05c551b7cf
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to a known malicious domain, masquerading as a game hack or generator. The document body explicitly mentions 'free Robux' and 'game hack', reinforcing the lure. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

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-on-pc-2021-game-hack In PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/is-minecraft-free_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-games_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/coin-master-spins-for-free_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-inspect-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/hack-the-robux-2021_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/roblox-hack-game_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/oginject-co_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-gift-card_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/how-to-cheat-in-roblox_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/minecraft-hacks-wurst_GM479516143.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-robux-picture_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/free-spins-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://radiocaxias.com.br/portal/imagens/files/pubg-uc-on-discount_GM1330123889.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00002f1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F1E 21880 bytes
SHA-256: d228279ba1634cffd3eca755a72b019103bac39f7436a2e25b94f0e5d21dc201
font_01_sfnt_off00005f4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F4C 19540 bytes
SHA-256: 02eafea25953af9a63d79e6d680b7a7dbb3ecddaffc247a3129342a1978cb967

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