Malicious PDF — malware analysis report

Static analysis result for SHA-256 09030fba13a78041…

MALICIOUS

PDF

44.7 KB Created: 2021-06-13 18:23:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 4655b6dd85500bbad956bc5dd8a0ece9 SHA-1: 2c5d66d25317ba2103ea228088b1c517e83b11ab SHA-256: 09030fba13a7804103d2ebfc74322afca8fe896e48dfd3cd6d89017643165cc9
180 Risk Score

Malware Insights

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

This PDF document contains multiple invisible links and visible text that impersonates Amazon to lure users with the promise of free Roblox gift card codes. The primary malicious link, http://netcdn.co/app/431946152/free-roblox-gift-card-codes-that-haven't-been-used-yet-game-hack, is identified as a known malicious redirector. The document's structure and content strongly suggest a credential phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Invisible PDF links to CAPTCHA-themed web lure high PDF_CAPTCHA_LINK_LURE
    PDF contains invisible clickable link annotations that point to a CAPTCHA/capcha-themed web path. This is a common phishing and ClickFix-style routing pattern: the PDF itself is inert, while the linked page performs the credential prompt or fake verification.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: http://netcdn.co/app/431946152/free-roblox-gift-card-codes-that-haven.
  • 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/free-roblox-gift-card-codes-that-haven In PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/roblox-hack-phantom-forces-cheat-engine_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/free-robux-no-downloads-2021_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/mining-simulator-hack-roblox_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/gears-online-roblox-hack_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/roblox-free-app-game_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/does-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/roblox-hack-new-dtfb-test_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-hack-roblox-jailbreak-money-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-stuff-roblox-march-2021_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-robux-without-downloading-apps-2021_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/robux-hack-dll_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/cheaten-bei-roblox_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/roblox-hack-peoples-robux_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/free-robux-with-recapcha_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/how-to-get-robux-for-free-on-pc-without-downloading_GM431946152.pdfIn PDF document text
    • https://acode.com.br/wp-content/uploads/fsqm-files/cool-roblox-free-games_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
stream_003_off000049fd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49FD 28632 bytes
SHA-256: 804f8ef0b839f1a6e6f5e8e3a2a5fff14487be89723f56cec32ddefddea004f0
font_01_sfnt_off00008976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8976 19268 bytes
SHA-256: 2c78b2e50c578d7823db6e306d9ff46ce0b4ac48433b5aed16a3de67fc2cad2e

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