Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb65e3ea01e59e1b…

MALICIOUS

PDF

34.4 KB Created: 2020-04-04 10:07:22 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5102790d360f174b9c9da5432a817c52 SHA-1: 249cfda478da340e0edebec8c4fe59ebea454619 SHA-256: fb65e3ea01e59e1b65f056846fa34b6905602f48c3727de32dd52d7c32f33118
62 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, many of which point to other PDF files on various domains. This pattern is indicative of a link farm designed to host malicious content or distribute malware. The document body itself is heavily obfuscated and contains what appears to be junk data, further supporting the malicious intent of the embedded links.

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://cjfalconer.com/uploads/1/3/0/6/130620767/130620767.html#quantitative+analysis+western+blot+imagej
    • http://kcparsonnet.com/uploads/1/3/0/4/130488914/f231d8.pdf
    • http://wangyaofabric.com/uploads/1/3/0/8/130873771/3775760.pdf
    • http://ukiahrvpark.com/uploads/1/3/0/7/130739951/fe4541dd9f.pdf
    • http://notaryofnh.com/uploads/1/3/0/5/130588596/fipiruv.pdf
    • http://lamusica-productions.com/uploads/1/3/0/8/130813533/xudaku.pdf
    • http://scaryzooapparel.com/uploads/1/3/0/6/130621261/lajuzonabedudoti.pdf
    • http://haseloff.family/uploads/1/3/0/5/130589331/443c36c85d8.pdf
    • http://doughballexpress.com/uploads/1/3/0/4/130488759/fukaremu-mulapir-wapixokukuni.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_off00005fbb.bin
b825866583f6d28926db00932e0f9fed49b6d99133dfc87d5a547e5a4b7b2691		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FBB 7512 bytes

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