Malicious PDF — malware analysis report

Static analysis result for SHA-256 4293c7a97ddacf63…

MALICIOUS

PDF

35.5 KB Created: 2021-06-30 21:32:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 99ca490f6b6e7c36947a8e163a584624 SHA-1: 39b680c6b71f9fedc33fd302d921ce0bfc388af0 SHA-256: 4293c7a97ddacf6311a95bb302004affd00c9aa5e139a08be1dbcc7c8247652d
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to sites offering game cheats or currency generators for popular games like Roblox and Coin Master. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external links, suggesting a link farm or SEO poisoning tactic. The ML classifier also flagged this PDF as malicious with high confidence. The document body and embedded links strongly suggest a phishing or scam attempt to lure users to malicious websites.

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/how-to-get-free-robux-on-roblox-generator-game-hack PDF link annotation
    • http://smpn1sda.sch.id/slims/repository/wall-hack-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-roblox-escape-room-cheats_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-sound-daily-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-free-2021-com_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-hack-no-human-verification-2021-no-download_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-hack-no-game-download_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/robux-2021_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/getting-robux-free-for-roblox-no-paying_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/los-mejores-hacks-para-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-spin-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/free-links-for-free-coins-and-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/roblox-how-to-hack-a-perso_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/how-to-get-skeleton-for-free-in-roblox_GM431946152.pdfIn PDF document text
    • http://smpn1sda.sch.id/slims/repository/coin-master-free-spins-hack-iphone_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_off000031c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31C3 23000 bytes
SHA-256: 565f45a51c8911d77f61840535c9363ebdaff1b5563ac34f0c0f3eb900539b77
font_01_sfnt_off000065b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65B0 19056 bytes
SHA-256: 231c02db13919540f4346d6ad90deb16be98efb00c07e68b4af0b65de5490315

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