Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9b4b834e1e1dcbb…

MALICIOUS

PDF

37.7 KB Created: 2020-04-22 17:31:58 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 888189dc068c3ce3946e0a6153263411 SHA-1: 491baa3bf9ab5901760b3220cb2e53e8e2bd1ebb SHA-256: c9b4b834e1e1dcbb2e51020db4b46d28a5063b21a57ba0f3599295192ca5582a
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to similarly structured URLs on different domains. This indicates a link farm or SEO spamming technique. The primary purpose appears to be directing users to potentially malicious websites, as evidenced by the heuristic 'PDF_SEO_LINK_FARM' and the presence of numerous unknown-reputation URLs. 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://bizpatch.net/uploads/1/3/1/4/131452799/131452799.html#candy+crush+friends+saga+mod+apk+revdl
    • http://marijuanatops.us/uploads/1/3/1/4/131437531/a6e1a350688a62a.pdf
    • http://marybeads.com/uploads/1/3/1/3/131398064/velojaduro-rajafexat.pdf
    • http://donnerswimclub.com/uploads/1/3/1/0/131069824/ce554f61a58d3.pdf
    • http://heartsdesireaccessories.com/uploads/1/3/0/2/130272406/14a8432300f79.pdf
    • http://firstratebuys.com/uploads/1/3/0/7/130738764/2011278.pdf
    • http://lccommunityradio.net/uploads/1/3/1/6/131606453/731454bcf8c1.pdf
    • http://automobi.lease/uploads/1/3/0/8/130813827/604b2.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_off000069f1.bin
e3ad9ff0ad38d376d9ec6c7e6015192e6c882dddcb1add3e9cde91d39d17ef92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69F1 8576 bytes

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