Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b7b9a6667f03034…

MALICIOUS

PDF

35.7 KB Created: 2020-04-03 17:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 90ae6cb06873423967c73605ec6dc66e SHA-1: 65c33e0aeb79937cd744d4a86f946f9384b7778e SHA-256: 1b7b9a6667f030343b573d2d59c5b25269a89f99ccda883e6bdf6ab91f443df8
122 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm designed to manipulate search engine results or host malicious content. The ClamAV detection further supports its malicious nature, classifying it as Pdf.Dropper.Agent. The embedded URLs suggest a delivery mechanism for further stages of an attack, potentially leading to malware download or phishing.

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.
  • ClamAV: Pdf.Dropper.Agent-9277964-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9277964-0
  • 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://roseassociatesllc.com/uploads/1/3/0/8/130874289/130874289.html#the+prince+of+milk+pdf
    • http://davidseanslik.com/uploads/1/3/0/3/130323624/8876825.pdf
    • http://maryharrah.com/uploads/1/3/0/4/130488270/detobobukidisu_gasomumuj_paluzo.pdf
    • http://maxtrendresourcesllc.org/uploads/1/3/0/7/130776786/d8e1b1e0179efd4.pdf
    • http://almahandpans.com/uploads/1/3/0/6/130604612/kinudabo_sanitujoxepo.pdf
    • http://funthoughtsonlife.com/uploads/1/3/1/3/131398253/jutuvikowivop.pdf
    • http://twin-beast.com/uploads/1/3/0/5/130588407/pujulinak.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_off0000633a.bin
a8837ce70b3bae19a2e910037726ffec91835d2f70c4b2992a8e5007c7449346		 pdf-font-stream PDF embedded font (sfnt) at offset 0x633A 8252 bytes

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