Malicious PDF — malware analysis report

Static analysis result for SHA-256 88a584dd1856f39f…

MALICIOUS

PDF

50.8 KB Created: 2020-06-18 08:50:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 478f69c28f855eea02a88cb10fa34d85 SHA-1: e3fc432732a6d3958376db1314acabafdc2c9c22 SHA-256: 88a584dd1856f39f620eaf27bc86edb589da9ff15dc7777fe52a4c436f31250c
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded external links, many of which point to other PDF files hosted on various domains. This pattern is indicative of a link farm or SEO manipulation tactic, likely intended to drive traffic or distribute further malicious content. The document body itself is heavily obfuscated and contains metadata from the wkhtmltopdf tool, suggesting it was programmatically generated.

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://datanetguatemala.com/uploads/1/3/2/6/132682930/132682930.html#zumba+exercise+songs
    • http://mayt.fi/uploads/1/3/1/3/131379296/80202ab38fed92.pdf
    • http://schickebrasil.ch/uploads/1/3/0/3/130324191/cc4c2e41.pdf
    • http://courageousdaughters.com/uploads/1/3/1/4/131483209/e03c6c0be0397c2.pdf
    • http://hostmaster.turtlebee.co.uk/uploads/1/3/0/5/130551086/wesume-pevobukugarole-guzapuvizejijeb-jalakojikov.pdf
    • http://sf-cm.com/uploads/1/3/0/9/130969270/c99b5d76e.pdf
    • http://mta-sts.mx.signaturecaribbeanweddings.com/uploads/1/3/0/3/130323914/jufolawuwulutuwateb.pdf
    • http://starspangledbabe.com/uploads/1/3/0/8/130813601/8867b9bf7.pdf
    • http://katskornerinternational.org/uploads/1/3/1/4/131438202/razonegupel_boriz.pdf
    • http://aaafinance.net/uploads/1/3/0/7/130739476/783c9b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008732.bin
50e3f2aad2f0ca4fe82d6b223d16968ad700b4d27487d51c36f583c989e7bb5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8732 5056 bytes
font_01_sfnt_off00009848.bin
9246bae1a0ddfda4fdaa7115e5856f336afa93230719803e8becac1ad8e2c265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9848 11768 bytes

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