Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd5cf6a4544c407…

MALICIOUS

PDF

35.1 KB Created: 2021-06-30 04:35:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: bed58a7cfb615d9af2f7b6cf308622cb SHA-1: 64ad42e6947772aca1783ae8676090767b087ad7 SHA-256: 6cd5cf6a4544c407c77356c38b992f1b7b47d26112c58698a1bc5e684676ec16
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded URLs and invisible links designed to lure users into clicking on them. The lures, such as "free Robux" and "game hacks", are common social engineering tactics. The heuristic 'PDF_CAPTCHA_LINK_LURE' specifically indicates that these links lead to CAPTCHA-themed web lures, suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • 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.
  • 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/roblox-jailbreak-geld-cheat-game-hack PDF link annotation
    • http://lib.kunci.or.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-202119_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hackaron-roblox-hack-link_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-card_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-money-adder-apk-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/coin-master-free-cards-link_GM406889139.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-e-free_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-robux-without-captcha_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/hacking-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/synapse-download-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/free-roblox-reddem-cards-live_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://lib.kunci.or.id/repository/how-to-get-free-pant-and-free-shirt-roblox_GM431946152.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_off00002fda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FDA 22808 bytes
SHA-256: c8b19eda5afc1dea78d4568295fdfed56b996e93102a1977e5d50ca14ab045d3
font_01_sfnt_off00006309.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 19384 bytes
SHA-256: bfde0f52846248d925b34c10b49cfd3b313c2fa70ce494ee79364ae06a48785c

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