Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eed90eeae6b6a88…

MALICIOUS

PDF

36.9 KB Created: 2020-06-18 08:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1934c8d3ae332d97edc9acfd27ebfc3 SHA-1: d87e40427b40aa762695e11346e5c139e4ceae5d SHA-256: 1eed90eeae6b6a88e22d5c053e72ddc6a236dc4f3c770e493456bfcb116aad6e
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF document contains a large number of external links, many of which point to suspicious domains structured similarly to SEO link farms. The ML classifier strongly indicated maliciousness. The embedded URLs are likely used to redirect the user to malicious websites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 3

  • 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.
  • 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 http://vps6-internal-admins.pleasingfood.com/uploads/1/3/0/9/130969686/130969686.html#64+bit+pdf
    • http://circumsolarmp.co.uk/uploads/1/3/0/2/130270823/4ede194c.pdf
    • http://villevilleporc.net/uploads/1/3/0/5/130588467/cfe942567cbc52.pdf
    • http://musictheatercareers.com/uploads/1/3/0/3/130313536/6381429.pdf
    • http://plussizebridesmaiddressma.com/uploads/1/3/1/3/131379421/5109c9cd.pdf
    • http://mail.cocodancewear.com/uploads/1/3/1/3/131380539/godipul-detaxu.pdf
    • http://gerardleen.com/uploads/1/3/0/9/130969525/voxibux_gewazukiwup_girawuxabifik.pdf
    • http://mta-sts.ironcastlemarketing.com/uploads/1/3/0/8/130813654/1253784.pdf
    • http://whyshophere.net/uploads/1/3/0/5/130589264/devetulemeg-tebazojogese-legovefon-situvud.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f04.bin
1ef940abebab2854f65f2bb7c86061879bec06e26e04ac72f94770c9ce849934		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F04 4260 bytes
font_01_sfnt_off00005d7d.bin
9a49c013902c04bf4a864f071bfe3a97fe3a4876f2c9c95d8a58e05654f413d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7D 15588 bytes

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