Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dfb9f5a644cb69d…

MALICIOUS

PDF

34.4 KB Created: 2021-06-20 01:55:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: ff98d189ae1f28131196e44875bfe683 SHA-1: dca0753ccdb2e7e7d1df58e02cfa006822a0158f SHA-256: 6dfb9f5a644cb69dc0c77a643a6875f1ee5fadb073bb9430514fd0ca46965789
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of embedded URLs, many of which are structured as SEO-optimized links to game-related content such as hacks and free items. The presence of a "download button" heuristic and the ML classifier's high confidence score indicate malicious intent. The document likely serves as a lure to drive users to these external sites, which may host further malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/comment-hacker-jailbreak-roblox-game-hack PDF link annotation
    • http://cintabaca.org/katalog/repository/coin-master-collect-today-free-spin_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-toys-for-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-put-in-hacking-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-someones-roblox-account-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-hack-daimonds-on-roayale-high-in-roblox_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/how-to-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/minecraft-reach-hack_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/village-3-coin-master_GM406889139.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/minecraft-gun-mod-download-free_GM479516143.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/cpbildco-robux_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog//repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://cintabaca.org/katalog/repository/roblox-adopt-me-free-pets_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_off00002ff5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF5 22136 bytes
SHA-256: cb86775b546fb01a08dfa52bd6b354f85cab7651c6a29077114678dfebcaff71
font_01_sfnt_off000060d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60D8 19308 bytes
SHA-256: 6072b4307eb48ee6e33b2feb12dbce684719c3531bf795f5577ece86f74c47ef

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