Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bf13ecbf0041c94…

MALICIOUS

PDF

40.5 KB Created: 2020-04-04 08:56:03 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7613a6993fa7ce55f7f0a263aab5f8c6 SHA-1: 35ec3efb58eaf09cb31ad38af43c70314b816abc SHA-256: 8bf13ecbf0041c94d51176e7587d0e219fca4bcc4c8e9a1f195ae275bff7ea00
122 Risk Score

Malware Insights

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

The PDF file was detected as a dropper by ClamAV, indicating its primary purpose is to deliver other malware. It contains a large number of external links, many of which point to PDF files on various domains, suggesting a link farm or redirection mechanism. The document body, though partially garbled, contains text related to 'free WordPress templates in Spanish', which serves as a lure to entice users to click on the embedded malicious links. The heuristic PDF_SEO_LINK_FARM specifically highlights the mass external PDF link farm.

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-8375819-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8375819-0
  • 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://thegapfestival.com/uploads/1/3/0/9/130968947/130968947.html#plantillas+gratis+de+wordpress+en+espa%C3%B1ol
    • http://tessaandjay.com/uploads/1/3/0/6/130621095/452707.pdf
    • http://power101jamz.net/uploads/1/3/0/3/130313265/10b820bdc.pdf
    • http://belikethefrench.com/uploads/1/3/0/7/130775294/vivile-rixirodova.pdf
    • http://speechpathcntr.com/uploads/1/3/0/2/130289392/sediwimozi.pdf
    • http://concordbcva.com/uploads/1/3/1/1/131164387/81799.pdf
    • http://mud-and-marble.com/uploads/1/3/0/6/130621928/pujagirifeni.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_off000073a6.bin
89f151375bb4503b82b62bc5c451da05a4c83cce5141b2aa2802a60281d536cc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A6 8656 bytes

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