Malicious PDF — malware analysis report

Static analysis result for SHA-256 a46d3abd11fe470a…

MALICIOUS

PDF

35.4 KB Created: 2021-06-29 12:50:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 082adc4e58490cf08c301a2e604a8375 SHA-1: b76d68be7e5b943bd6cf5d950ddf247f3fa955a6 SHA-256: a46d3abd11fe470af4dfed85894fe0cc9ac58ecf78a5dd4ac7f1602b859ac8fb
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a 'doc body' that explicitly advertises free Robux and game hacks, acting as a lure. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm designed to redirect users to potentially malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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-robux-for-watching-videos-game-hack PDF link annotation
    • http://perpustakaan.man2kotaserang.sch.id/repository/how-to-cheat-money-on-roblox-retail-tycoon-glich_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/20210-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-hack-spins-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-back-your-hacked-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/is-there-an-actual-hack-that-work-for-coin-master_GM406889139.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/how-to-get-roblox-jailbreak-hacka_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id//repository/coin-master-free-spins-2021-haktuts_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-booga-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/hackeando-en-roblox_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/hack-kill-roblox-phone_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/free-tiktok-followers-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/roblox-cheat-engine-robux-2021_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/robux-hack-me-no-human-verification_GM431946152.pdfIn PDF document text
    • https://perpustakaan.man2kotaserang.sch.id/repository/free-savage-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spins-cheat_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://perpustakaan.man2kotaserang.sch.id/repository/roblox-mineverse-hack_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_off00003125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3125 22616 bytes
SHA-256: 2a071d5c188ed592455bf662e125f990b8744d5ab810fe27deb5cb3004e2093e
font_01_sfnt_off000063b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B4 19612 bytes
SHA-256: 2fc76e566a442159cc62e38e8a842fd89c61453598b95ab21fee5ca32c66295c

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