Malicious PDF — malware analysis report

Static analysis result for SHA-256 45e6c3fc050df559…

MALICIOUS

PDF

45.1 KB Created: 2021-05-16 20:11:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8366597bb35f79576d0558b2acf590e9 SHA-1: 8d648efa82d63c2e59e1a85a1a06896b009dff4d SHA-256: 45e6c3fc050df559a0d8857dd8547a8f41db71ba66e46355315b286ee227d90d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded URLs and a lure for free in-game items, strongly suggesting a phishing or social engineering attack. The ML classifier also flagged this PDF as malicious with high confidence. While no scripts were directly extracted, the presence of external URIs and the document's content indicate an attempt to redirect users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/how-to-make-roblox-clothes-for-free-game-hack PDF link annotation
    • http://brokermortgages.com/images/robux-com-free_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/free-coins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-coins-and-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/easy-robux-com_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-but_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/can-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • http://brokermortgages.com/images/roblox-rewards_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/free-robux-obby-2021_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://brokermortgages.com/images/free-roblox-com_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://brokermortgages.com/images/easy-way-to-get-free-robux_GM431946152.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_off00004b70.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B70 29436 bytes
SHA-256: 0d91ccbff8a28d483382d4e5e5fc2a5273ddd6d08c4fad1186d1e2d18d2097a0
font_01_sfnt_off00008c43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C43 18976 bytes
SHA-256: 75869b94c2b17b25dac59f0b0f7f9ff270f85e9e7170da1a335b6396ed3bda83

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