Malicious PDF — malware analysis report

Static analysis result for SHA-256 09edda9fa4987b32…

MALICIOUS

PDF

36.7 KB Created: 2021-07-06 09:12:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 43d88ef5a467d574a6e2401f8192ed90 SHA-1: fe9be4fa5eed250bc7885fc77ae215a017313b23 SHA-256: 09edda9fa4987b32d50807119746ba0af2c44d4b516bdc009cb8fb9b693f48c4
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 SEO-optimized to appear as legitimate resources for Roblox hacks and free Robux. The document body explicitly mentions 'Free Robux Generator' and includes a URL pointing to a potential download, indicating a social engineering tactic to trick users into downloading malware. 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.tw/app/431946152/free-robux-generator-no-survey-no-download-no-human-verification-game-hack PDF link annotation
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/vampire-hunters-2-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-get-free-robux-on-a-game-on-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/www-roblox-com-robux-free-download-no-surveys_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-reaper-simulator-hack_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku//repository/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-robux-hack-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-into-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • 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/robux-pin-free_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-slender-man-outfit-free_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/roblox-hack-animation_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-robux-inspect-2021_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/how-to-hack-tix-and-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/prison-life-script-roblox-hack-pastebin_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/free-roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://uptperpustakaan.unismabekasi.ac.id/katalog-buku/repository/all-roblox-promo-codes-free-items_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_off0000370f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x370F 21836 bytes
SHA-256: 30df4a5dee201595a4485c299df81ea5e1a32950677d097821d269f93c7f0f84
font_01_sfnt_off0000670c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x670C 20208 bytes
SHA-256: 0ef666815fca28e6c6cf3435968b0c81522e44f0a8d83e831ed265583d1f0e29

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