Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef5409e28147ddc…

MALICIOUS

PDF

35.9 KB Created: 2021-06-30 09:21:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: b09482d479d71199d963135f0aa5fee9 SHA-1: 2fe74bf400fa5837ae812d265f05edbbf920de07 SHA-256: cef5409e28147ddcaa18692cecf32e5b0c096505fed317a81d1ab26e3b0ac6c5
102 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, identified by the PDF_SEO_LINK_FARM heuristic, that promise free in-game items and currency for popular games. The ML classifier also flagged this PDF as malicious with high confidence. The document body and extracted URLs suggest a lure to phishing or malware download sites.

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-enter-paid-games-for-free-roblox-game-hack PDF link annotation
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-chest-in-coin-master_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-hack-online-without-human-verification_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-sad-cheating-story-lbert_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-with-no-survey_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/savagefrey-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/master-coin-hack-app_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/minecraft-apk-free-download_GM479516143.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/tiktok-free-qr-code_GM835599320.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/how-to-get-free-mods-in-minecraft_GM479516143.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-with-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/mcpe-master-hack-unlimited-coins-apk_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/haktuts-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://hipmibadung.or.id/new/public/ckfinder/userfiles/files/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3211 23088 bytes
SHA-256: 53d9fd8b6c23a379cf5d88cfb651d0971585faa19b348e659217b9c0c6b45be7
font_01_sfnt_off000065f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x65F1 19628 bytes
SHA-256: 3e5146c2619db37ab0f0229248404e425077a420e02d82d65a5ca12bb192614d

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