Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6d7edacd32235a9…

MALICIOUS

PDF

41.0 KB Created: 2021-05-19 19:12:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 3e2942fc46235a620999d117ae78c1b7 SHA-1: 53b492d245f6ff380d9c407e35a3a8a9d9fa0ee9 SHA-256: c6d7edacd32235a9f158b51a88cbe93528d463e9d19d083db30ea9a5618d2f44
102 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which are structured as SEO-optimized PDF slugs, suggesting a link farm designed to attract traffic. The presence of a "download button" heuristic further supports the idea that the document is intended to trick users into clicking links that lead to potentially unwanted or malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/835599320/tiktok-free-folowers-jio-phone-install-tamil-game-hack PDF link annotation
    • http://jdlrelocation.com/images/coin-master-hack-mod-apk-unlimited-spins_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-get-cheap-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://jdlrelocation.com/images/lazyblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/instagram-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-free-gift-cards_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-real-hack_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-free-spins-link-2021-app_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/how-to-get-minecraft-for-free-on-xbox_GM479516143.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-hack-2021-link_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/try-minecraft-free_GM479516143.pdfIn PDF document text
    • http://jdlrelocation.com/images/aristois-minecraft-hack_GM479516143.pdfIn PDF document text
    • http://jdlrelocation.com/images/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-master-hack-apk-2021-ios_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://jdlrelocation.com/images/coin-spin_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
stream_003_off0000451b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x451B 24336 bytes
SHA-256: 11cd1c952502507b3f3415a4792030d4656b0f1b9307f965d8305d2e6fc32de0
font_01_sfnt_off00007cfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CFB 18668 bytes
SHA-256: ca38ffe11ae802f341772a2f3bfe0e6c0e59f8c3a8b6f33e482ad41afdece02a

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