Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c5120c7c6500e3b…

MALICIOUS

PDF

35.6 KB Created: 2021-06-26 19:21:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 1a7b44b75c2fa551a9f71607df4b577b SHA-1: 54585646f6cb50fccfb282489dd10ee78f341831 SHA-256: 4c5120c7c6500e3b41ed1aa8c5595fe0a1e5379ba9722cf366f009cbabcc51c2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains numerous links to external websites, many of which are presented as resources for game hacks and cheats. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of such links, suggesting a malicious intent to direct users to potentially harmful content or exploit kits. The ML classifier also strongly flagged this PDF as malicious.

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-blox-no-hero-academia-quirk-hack-game-hack PDF link annotation
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/como-hackear-roblox-para-tener-robux-2021_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-roblox-without-verification_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-weight-lifting-simulator-afk-speed-cheats_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-robloxs-website_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-gift-card-codes-for-free_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-hack-robux-generator-download_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-meep-city-money-hack_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/a-wolf-or-other-roblox-cheats_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/undetectable-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/roblox-www-com_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-roblox-accounts-2021-with-robux-bugmenot_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/a-free-robux-gift-card-number_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-street-racing-unleashed-beta-cheats_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-money-on-jailbreak-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-roblox-with-just-a-site_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-robux-gift-cards-no-survey_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/codes-for-free-robux-on-xbox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-mod-apk-free-shopping_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-use-cheat-engine-on-roblox-high-school_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_off0000304d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304D 23168 bytes
SHA-256: 021ea92137a6a1aedf9859eb0dd520787187a3075ea0a3f3a3cb2e8aa726cfc4
font_01_sfnt_off0000649f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649F 19508 bytes
SHA-256: ff0b697f29ebe6a0b54563605eacf38efacbe0c22beff970f7a29263df53e630

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