Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ef3a196263fd10f…

MALICIOUS

PDF

44.8 KB Created: 2021-05-13 14:11:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: a9fe1d969b090e54dd330c7d1e1b434c SHA-1: a98f329013090a2ba58d4aad37de22077e6b88fb SHA-256: 7ef3a196263fd10f359db7b014e8e07527fbe1031bcd1bd3bea9c6f6086945b7
102 Risk Score

Malware Insights

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

The PDF document contains numerous links to external PDFs, many of which are SEO-optimized with keywords related to "Coin Master" hacks and free Robux. The presence of a "download button" lure and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content or downloads. The document body itself contains a primary URL pointing to a "coin-master-hack-tool" and references the application used to generate the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9632

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/406889139/coin-master-hack-tool-without-verification-game-hack PDF link annotation
    • https://www.yatrikathmandusuite.com/userfiles/files/lazy-blocks-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/easy-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/coin-master-free-spins-and-coins-group_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/easy-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-spins-on-coin-masters_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/free-spins-coin-master-2021-app_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-minecraft-for-free-on-mac_GM479516143.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/hack-my-game-xyz-coin-master_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • https://www.yatrikathmandusuite.com/userfiles/files/how-to-get-minecraft-pe-for-free_GM479516143.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_003_off00004abe.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4ABE 24464 bytes
SHA-256: 056d596de055ba7ce9850dd867ea466d14b37d8b9b73dd68fb395d7cb465217e
font_01_sfnt_off00008278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8278 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00008c2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C2A 18428 bytes
SHA-256: 0d4d1d3c8b3a8d9a8bf2514a91debdfd463a95143a55049788bc4d3b9a66685d

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