Malicious PDF — malware analysis report

Static analysis result for SHA-256 84c55214621e2b3c…

MALICIOUS

PDF

34.0 KB Created: 2021-06-26 19:40:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: eed5c61a882d4607da03f2e40139ed12 SHA-1: 7fdd1a0d45e9c9a8a75194b6d786703bba0fd8e1 SHA-256: 84c55214621e2b3c26abac71e9ce29b037466a41b74c94456bb7cc1fe8a61599
102 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which are part of a link farm designed to attract users searching for game cheats and free in-game currency. The presence of a 'download button' heuristic further suggests a lure to download potentially malicious content. The ML classifier strongly indicates malicious intent.

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/roblox-free-robux-bot-game-hack PDF link annotation
    • http://lib.fisipumt.ac.id/repository/roblox-brocken-bones-4-cheats_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-roblox-card-meepcity_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-speed-hack-on-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/robux-hacks-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/how-to-hack-granny-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-for-today_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-items-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/free-robux-codes-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id//repository/se-puede-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/como-tener-robux-gratis-sin-hacks-facil-y-rapido_GM431946152.pdfIn PDF document text
    • http://lib.fisipumt.ac.id/repository/coin-master-free-spins-link-2021-today_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_off00002f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F51 22092 bytes
SHA-256: bf41c8b485d1f908297d14b68ca3f8bd31313cab426b94377f009f95c0dd3aeb
font_01_sfnt_off00006054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6054 18896 bytes
SHA-256: 15882a1710728cf6e41f4bbbddf2ebb75d288d48b2ccfcf8bccadd65e604afbe

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