Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cd1ddb182becac4…

MALICIOUS

PDF

35.9 KB Created: 2021-06-30 17:02:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 482fda502e02f6d1bcdb991aae369e27 SHA-1: 8067839e0ee086946bd564eaccc2e3c4ffb3a1bc SHA-256: 6cd1ddb182becac46a59101befe34e9fe4ee910d6912ffd0d7746ee8f774c79f
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous external links, many of which are SEO-optimized and point to sites offering game-related cheats or hacks, indicating a link farm designed to attract users. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a 'download button' heuristic further supports a malicious intent to redirect users to potentially harmful content. No scripts were extracted from this sample.

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/free-builders-club-roblox-no-human-verification-2021-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/roblox-hack-999999-robux-2021-pc_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-hack-no-human-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/db-af-roblox-free-htc_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-make-a-free-ad-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-fly-hack-not-a-virus_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-minecraft-account-and-password-generator_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hack-roblox-como-tener-robux-gratis-2021-octubre_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-item-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-promo-codes-2021-works_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-admin-roblox-how-to-turn-itto-others_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/city-free-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hack-tool-v1-9_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/cheat-engine-hxd-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/fly-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.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_off00003125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3125 22872 bytes
SHA-256: 2135587781bf45f61df05851d2fd5f6d50cc42dc9743797a9daefdfd62f6346b
font_01_sfnt_off000064b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64B3 19984 bytes
SHA-256: c6ee60e3bcb46178a6fe2a8ea4736343daa272528afff196f55489da9436e525

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