Malicious PDF — malware analysis report

Static analysis result for SHA-256 8036d3fa5f2ce5ba…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 04:16:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 067fcd914d6e193c926563b496eebe9b SHA-1: 13eeb5e8c2b44b4fc015ae2d64bf9b5898b2c18e SHA-256: 8036d3fa5f2ce5ba56aa37568be6cbc2bccf5f5d641aa9b642c7ec67bfa64b88
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link that redirects to malicious infrastructure, specifically advertising a 'free generator / game hack'. This lure is designed to trick users into navigating to a potentially harmful website. While no scripts were extracted, the presence of malicious redirector links and the ML classifier's high confidence indicate a high likelihood of a phishing or scam attempt, likely delivered as a spearphishing attachment.

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/835599320/is-tiktok-free-to-download-game-hack In PDF document text
    • https://c2o-library.net/catalog/repository/why-does-roblox-servers-shutdown-when-cheat-engine-is-on_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-download-100-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-jailbreak-admin-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/free-robux-hack-website_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/cool-tshirts-roblox-for-free-sharkblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-build-a-boat-hack-nopde_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/hackear-cuentas-de-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/secret-robux-hack-subscribe-to-make-it-works_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/weird-roblox_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/tiktok-for-free-download_GM835599320.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/roblox-jailbreak-money-hack-generator_GM431946152.pdfIn PDF document text
    • https://c2o-library.net/catalog/repository/can-you-get-free-robux-on-roblox_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_off00003129.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3129 22380 bytes
SHA-256: 661c951aca9d9df1fdcc1845a7e106a6dbcb217691c09a7a4d9fc689e70d04bc
font_01_sfnt_off000062ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62AE 18552 bytes
SHA-256: 18a72797633a2ec6039a54d849dc45faa5e848e60646be5ed600f110732bdb67

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