Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eae62b113d6c8c0…

MALICIOUS

PDF

38.2 KB Created: 2020-04-26 04:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 90019736a38336d55a151797ac2fdd67 SHA-1: f905b89612a28dc25f835a96886a383ac3dd79e1 SHA-256: 4eae62b113d6c8c024b5859f6023038c7ef17930c97816f8f4b58d154dd6e806
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are structured as numeric slugs pointing to PDF files on various domains. This pattern is indicative of a link farm or SEO spam campaign. The document body, though heavily obfuscated, contains a URL that matches one of the extracted external links, suggesting the document's primary purpose is to redirect users to these external resources. No scripts were extracted from this sample.

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://alexmcmichael.com/uploads/1/3/1/4/131407155/131407155.html#habitos+alimenticios+libros+pdf
    • http://christinaandbilly.com/uploads/1/3/0/8/130814803/vamagixixogo.pdf
    • http://vlrrfc.com/uploads/1/3/0/5/130551467/lifuragok.pdf
    • http://dana-mielno.pl/uploads/1/3/0/5/130551187/tijizozeraxi_romepuxon.pdf
    • http://eisnerremodelling.com/uploads/1/3/1/6/131606670/40ed22b204be.pdf
    • http://austinaviationassociates.com/uploads/1/3/0/9/130969852/5348213.pdf
    • http://stillwatersweetsbakery.com/uploads/1/3/0/7/130776079/2951c7eef658.pdf
    • http://carefreemaster.com/uploads/1/3/1/4/131409463/vepebudalojuzemake.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a8d.bin
0fd0da507982dd0bef5b532dd8ca662bb0cc4f29e00d32ce3243001a10a80b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8D 9132 bytes

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