Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d9f623428309f8d…

MALICIOUS

PDF

38.5 KB Created: 2020-04-15 06:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: b23e5032f47814bd6a0e219ae627f8c2 SHA-1: 5be9d01dba4cc858862e11505b2fccf2d42a537c SHA-256: 2d9f623428309f8d656fce1282d3b8298303a5c73fa435ef4feacd52821b26e1
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links to other PDF files hosted on various domains, indicative of a link farm or redirection scheme. The 'PDF_SEO_LINK_FARM' heuristic firing strongly suggests this is an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also flagged this PDF with high confidence. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://petcrematorycincinnati.com/uploads/1/3/0/7/130740324/130740324.html#blank+banquet+event+order+template
    • http://hillsboropestcontrol.net/uploads/1/3/0/5/130589094/somerivuwazokol_petuf_sunatok.pdf
    • http://bintiessence.com/uploads/1/3/1/4/131452841/cc4b1a9268.pdf
    • http://thedogfriends.com/uploads/1/3/0/4/130483866/wamelerojavukebiwux.pdf
    • http://www.perfectimperfectionsbyjeanne.com/uploads/1/3/0/4/130494478/mojonuvopa-serexepusamo.pdf
    • http://santarosalearning.com/uploads/1/3/0/2/130272428/seziga.pdf
    • http://cashbackunion.com/uploads/1/3/0/8/130874533/124451f.pdf
    • http://cookingmywayorhis.com/uploads/1/3/0/7/130776277/962b853d9d.pdf
    • http://pinkribbonfair.com/uploads/1/3/1/4/131437268/f4efbc04fd0.pdf
    • http://proudboyscleveland.org/uploads/1/3/1/3/131398380/2436518.pdf
    • http://darlingrestaurant.com/uploads/1/3/1/3/131398576/jijinefaxisezure.pdf
    • http://davidellis-photo.com/uploads/1/3/0/5/130542894/vukom_darowuxutamamet_fosanonibemo.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_off00006e62.bin
14beb61d6dded04278787c7ca36be6e38bec01a155a6a27dde35827c30172128		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E62 7628 bytes

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