Malicious PDF — malware analysis report

Static analysis result for SHA-256 32c9a89acb325540…

MALICIOUS

PDF

35.3 KB Created: 2021-06-20 01:40:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a5bd546fe35368a212c37681ac974d65 SHA-1: efefc679a14baa70b1ee311ab4ba2bcddc7c6599 SHA-256: 32c9a89acb3255400af82731d79ae1dd78f04ecb2848db1a90eadd9f88003b4a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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-card-code-giveaway-game-hack PDF link annotation
    • https://cnc-xinrong.com.tw/image/data/files/best-roblox-hacks_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/codde-for-free-roblox-hats_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-generator-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coinmaster-links_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/mobihack-roblox-hack_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-guide-to-free-spins-and-rewards_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-minecraft-bedrock-server-hosting_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-100-spin-slot_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-how-to-use-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/coin-master-hack-without-verification-code-2021_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/pokemon-go-free-trainer-codes_GM1094591345.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/roblox-studio-free-download_GM431946152.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/google-moon-active_GM406889139.pdfIn PDF document text
    • https://cnc-xinrong.com.tw/image/data/files/master-free-spin-and-coin-link_GM406889139.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_off00003220.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3220 22424 bytes
SHA-256: bfab9b6027ab71cb596737804b06316fb7124595ca432be4ed7238fbea3285f1
font_01_sfnt_off0000640a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640A 19400 bytes
SHA-256: bccd7ae88ea1c84ebfbe63ff5a20520f2cee34466e3c1fb77f538d1a0d22c5e3

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