Malicious PDF — malware analysis report

Static analysis result for SHA-256 461293b59a3d07df…

MALICIOUS

PDF

43.5 KB Created: 2021-05-20 05:33:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 4a60ad29cb39438b5c277764ed433fe1 SHA-1: aa5c4c39334a63a26e331f6e611f51a33cf9b60b SHA-256: 461293b59a3d07df31852d20c191b0e20f5220c98f6a48de3c653dc74d56fa85
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which are SEO-optimized and point to other PDF files, forming a link farm. The document body and embedded links suggest a lure related to "free Robux" or game hacks, aiming to trick users into downloading further malicious content. The presence of embedded URLs and the link farm structure indicates a likely attempt to distribute malware or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9893

Heuristics 5

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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/431946152/free-robux-that-actually-works-game-hack PDF link annotation
    • http://safari-crimea.com/images/tiktok-free-install_GM835599320.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-spins-haktuts_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/minecraft-free-play-now_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-apk-hack_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/minecraft_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/roblox-free-play_GM431946152.pdfIn PDF document text
    • http://safari-crimea.com/images/good-free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-card-link-today_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://safari-crimea.com/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00004118.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4118 24984 bytes
SHA-256: fa1368d919bae1f45f02c8a2e7922a8930b20f5807c31f151db85f9d1f8a6747
font_01_sfnt_off00007b11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B11 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off000084fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84FC 19136 bytes
SHA-256: e9e8736bed1826902485352f20294e96b644ee357cd6186db79dc9b33c578c67

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