Malicious PDF — malware analysis report

Static analysis result for SHA-256 94e4e76d9c7f4ddb…

MALICIOUS

PDF

34.1 KB Created: 2020-06-23 15:40:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cbafc64e5689a1fd14906c110c776343 SHA-1: 5eb82270c0541326818215351dfe3d5f017c359e SHA-256: 94e4e76d9c7f4ddbf86a230f9deb5b60ae2ad1a1d3e255b4d63fe53fb97f8dfa
70 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, a technique often used for SEO poisoning or to redirect users to malicious sites. The document body text and embedded URLs suggest a lure related to downloading a 'desk pdf converter free download'. The heuristic 'PDF_SEO_LINK_FARM' indicates a mass of external PDF links, with the dominant host being coastalfloorsde.com. No scripts were extracted from this sample, but the extensive link farm points towards a delivery mechanism for further malicious content.

Heuristics 4

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://mta-sts.mail.elginartsassociation.com/uploads/1/3/1/3/131379456/131379456.html#desk+pdf+converter+free+download
    • http://coastalfloorsde.com/uploads/1/3/0/2/130287813/78586397a.pdf
    • http://graceandgloryapostolicchurch.org/uploads/1/3/0/6/130621409/473e6f6ff4716d.pdf
    • http://fibedoctor.com/uploads/1/3/0/5/130550764/takeminanogaz.pdf
    • http://tmcs.services/uploads/1/3/1/4/131438592/5126938.pdf
    • http://mlhconsultancy.com/uploads/1/3/0/5/130542717/925879.pdf
    • http://blueprintgenealogicalassocllc.net/uploads/1/3/0/4/130436139/767faa486b2fd.pdf
    • http://eastbaycarpetcleaning.net/uploads/1/3/0/9/130969703/wijilewuxa-lonom.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_off00004af7.bin
82e118989e5216cacd5d7cb7acc0e73e65b5af193f3b8615f0926fb94abdd80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF7 5104 bytes
font_01_sfnt_off00005c74.bin
cf19164cb45b6d832051ca57bf222ac2d7c4f582d26fb902400ba5ecc3715963		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C74 9432 bytes

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