Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d5fb04c21ffe9c…

MALICIOUS

PDF

37.2 KB Created: 2020-04-09 01:01:51 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 7ed0fbff512e2194a1cb1faefe109ccf SHA-1: 6b1dfcce94a35ee2549a7dcf9029ffbf7f05043c SHA-256: 43d5fb04c21ffe9cb70d7d46cec1f89db7b16c3258accf4dfe68359e5465955e
62 Risk Score

Malware Insights

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

The PDF file contains a large number of external links to various domains, indicating a link farm or redirection scheme. The heuristic 'PDF_SEO_LINK_FARM' specifically flags this behavior. The document body, though partially obfuscated, contains a URL that aligns with the observed link farm pattern. The primary intent appears to be directing users to a network of potentially malicious or ad-serving websites.

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://csdrywallservices.com/uploads/1/3/0/5/130540077/130540077.html#atividades+de+l%C3%ADngua+portuguesa+para+6o+ano
    • http://astermaintenance.com/uploads/1/3/0/5/130539078/wegutemuxu.pdf
    • http://ilearnandsucceed.com/uploads/1/3/0/4/130488701/tenakezan.pdf
    • http://nikavikasisterhood.com/uploads/1/3/0/6/130605283/kiguzurixilos.pdf
    • http://thewendyhouseholidaylet.com/uploads/1/3/0/5/130551505/duvikas.pdf
    • http://edplco.com/uploads/1/3/0/9/130969548/9132252.pdf
    • http://repoqueen.com/uploads/1/3/0/5/130543106/batesepajeza.pdf
    • http://mta-sts.mail.juuriart.com/uploads/1/3/1/4/131408062/zubojazuraf_xawafagidin_zakudu.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_off00006320.bin
418b4e3973d28326d88ae0d578145d4923a79710fff212b49de1925fdbeb4e0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6320 10380 bytes

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