Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fe7c145962fff71…

MALICIOUS

PDF

45.2 KB Created: 2021-05-19 23:45:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: deeb4f714ce57052aa9bb02d9ae6ad44 SHA-1: 37cb569f29aebacd09074f50038cf69ab00cc6a0 SHA-256: 5fe7c145962fff71f5329845b925ed1e14c82942d0d5c0ff99efb30b205eb346
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded links, identified as a link farm, pointing to external domains. The document body and extracted URLs suggest a lure related to 'Robux' or 'Coin Master' game cheats, likely intended to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9551

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/431946152/add-robux-game-hack PDF link annotation
    • http://arkivthy.dk/images/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-spins-link-ios_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/free-op-minecraft-servers_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/mathep_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://arkivthy.dk/images/free-coins-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/minecraft-pocket-edition-download-free-pe-calculator_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/how-to-hack-mcpe-master-coins_GM406889139.pdfIn PDF document text
    • http://arkivthy.dk/images/is-minecraft-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • http://arkivthy.dk/images/easy-robux-today-com_GM431946152.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
font_00_sfnt_off000047f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47F8 25852 bytes
SHA-256: e633181ca1668de8340b1e14d577e9e5c4b1eccbd5a1c0eb8f0a426e808d7a93
font_01_sfnt_off000083d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83D7 3400 bytes
SHA-256: 4b3e0f36ad1e0c7e3ea5c178fd2b4f097d1e01575fc6a4101a8b520db34dfe07
font_02_sfnt_off00008f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F01 18024 bytes
SHA-256: 7c7f544dacbdd97523b26ca19281569c54d5524d70eae8adece71e08a4ebda33

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