Malicious PDF — malware analysis report

Static analysis result for SHA-256 a671ead31d452c76…

MALICIOUS

PDF

34.4 KB Created: 2021-06-29 15:53:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5732b73987ec37f7344056820f7bfc81 SHA-1: 5cda8401f8ecb4f2f6336d5cb4aa870435f10419 SHA-256: a671ead31d452c76bd1dab84bd1a91e1226cd84ccaf27765b0e0bb3a149b06a7
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which are structured as SEO-optimized links pointing to game-related hacks and cheats. The ML classifier strongly indicated maliciousness, and the presence of a 'download button' heuristic suggests a deceptive user interface. The primary attack pattern involves luring users to external sites that likely host malware or phishing content.

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/tycoon-hack-roblox-game-hack PDF link annotation
    • http://smkn1salatiga.sch.id/library/repository/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-minecraft-pe-for-free_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-money-in-adopt-me-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-discord-servers_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-lego-hack-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/rich-roblox-accounts-for-free_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-coin-master-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-coin-master-spin-app_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-admin-house-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/como-conseguir-robux-gratis-sin-hacks-pato_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-roblox-animation-script_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/top-ten-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-use-racist-dolphin-on-free-exploiter-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-no-verification-youtube_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-robux-for-free-on-ipad-easy-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-100-legit-robloxking_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-cheat-table-2021_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_off00002f49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F49 22812 bytes
SHA-256: 1aa2a49bcdcf86e064fcda9cff77d80c0d8eeae2c9d76286c4c02832e79f6bc2
font_01_sfnt_off000061fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61FA 18836 bytes
SHA-256: b49446f9877001d737b78e4b760255c19051b5cfe5164de2c90b2b5dc738915b

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