Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e469c36e8a0d558…

MALICIOUS

PDF

35.9 KB Created: 2021-06-19 21:44:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 61edf78365105324a2c9692a7ad9e0f2 SHA-1: d018c627775f4d9080cf913b38fe17f16f638c33 SHA-256: 9e469c36e8a0d558cca40ca83acde6e6ef1ac438f3698f85fee9a0889468cb71
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs and a document body that promises free Robux and game hacks, indicating a phishing or scam attempt. The presence of a large number of external links, many with numeric slugs, suggests a link farm designed to direct users to potentially malicious download sites. No scripts were extracted, but the overall structure and content point towards a social engineering attack.

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-cheats-roblox-game-hack PDF link annotation
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-pet-food-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-robux-for-free-2021-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-games-with-free-vip-servers_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-no-human-verification-ios-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-get-free-outfits-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-costume-roblox-glitch_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-btools-hack-2021-download_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/free-robux-web-page_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/hackcom-roblox-robloxian_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/roblox-comment-de-venir-un-hacker-lvl-2021-shinoby-life_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/rbx-hut-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/how-to-hack-to-get-infinite-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.pn-tapaktuan.go.id/repository/wear-trash-gang-merch-on-roblox-for-free_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_off00003430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3430 22784 bytes
SHA-256: 6f30726caa3e9eafb40508b80a4de8adf9c28f5415f43c6d5d55709d24bbb64c
font_01_sfnt_off0000677f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x677F 19060 bytes
SHA-256: edf041e3a13adcd04de623daab77366acc77b98e4d62929301c9267f5eaeefe9

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