Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4e5eb40c13607c…

MALICIOUS

PDF

38.9 KB Created: 2020-03-09 12:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 846d8b0ef3aaa919cf1a379e596d5d99 SHA-1: fd3297dc83bc6df5b8e1f27b938306a233f4193c SHA-256: 9e4e5eb40c13607c74d7d133e2e4f06f2dbe73bccff3e25b5a72ed3d84ab472d
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified as a PDF SEO link farm. The document body, though partially corrupted, contains references to 'Cosmic background radiation quizlet' and the authoring application 'wkhtmltopdf', suggesting a lure or content generation tool. The primary attack pattern involves directing users to a multitude of external PDF files hosted on various domains, likely for SEO manipulation or to distribute further malicious content.

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://tecrunner.com/uploads/1/3/0/9/130969993/130969993.html#cosmic+background+radiation+quizlet
    • http://oaklandcommunitycouncil.org/uploads/1/3/0/7/130775961/c9ccff74de8f.pdf
    • http://decalsgonewild.com/uploads/1/3/0/7/130775557/5293246.pdf
    • http://lakewayelmer.com/uploads/1/3/0/6/130620454/8107234.pdf
    • http://deftshop.net/uploads/1/3/0/3/130379435/wisomigode.pdf
    • http://nerdsville.org/uploads/1/3/0/6/130620508/8310885.pdf
    • http://candymonthly.com/uploads/1/3/0/8/130813381/zimagavebawodu.pdf
    • http://findoliviaandmason.com/uploads/1/3/0/5/130588778/fekixaxo-moromoxi.pdf
    • http://www.fireseedclay.com/uploads/1/3/0/9/130969206/2076476.pdf
    • http://rss-me.com/uploads/1/3/0/7/130740211/6161623.pdf
    • http://www.deepbginvest.com/uploads/1/3/0/2/130288549/5442955.pdf
    • http://brandonmillerbasketball.com/uploads/1/3/0/4/130478106/7982c779c22cc13.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_off00006f3a.bin
50f823e3d7c5558faddb21afe550e374704e5223239846230dc260dfee365259		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F3A 8092 bytes

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