Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fcd5131dd162499…

MALICIOUS

PDF

40.9 KB Created: 2020-03-30 07:41:09 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: bdc6f91514a12e78f437ee22a50b6d98 SHA-1: 220ded61a1177c4e026dd416bd7a9c53c25ac874 SHA-256: 1fcd5131dd162499e7ee8ce0520b1cd7ccd16b814a4281ff893f592b50e6f188
92 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to PDF files hosted on unrelated domains, suggesting a link farm or SEO poisoning tactic. The document body, though partially corrupted, contains text related to 'safety first thermometer battery replacement' and references to the wkhtmltopdf tool, indicating a lure to potentially malicious external content. The ML classifier strongly flagged this PDF as malicious.

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://iweargreatness.com/uploads/1/3/0/5/130589044/130589044.html#safety+first+thermometer+battery+replacement
    • http://kristiepottertherapy.com/uploads/1/3/0/5/130590395/wutekigigu-wosis-rikudaj.pdf
    • http://el049.elrepco.com/uploads/1/3/1/3/131383398/85d8f537bf.pdf
    • http://arloconstructionltd.com/uploads/1/3/0/4/130483043/3b7c2ad8340.pdf
    • http://msptohumboldtproducts.com/uploads/1/3/1/4/131407181/zesatosopipano.pdf
    • http://kpseasoning.com/uploads/1/3/0/8/130815192/fumise.pdf
    • http://versesandvows.net/uploads/1/3/0/8/130874265/misibiketujodokiri.pdf
    • http://incredibletandoor.com/uploads/1/3/0/8/130873902/4e055cac99e.pdf
    • http://gala4dreams.com/uploads/1/3/0/6/130604740/224ac9.pdf
    • http://ashleylania.com/uploads/1/3/0/3/130313561/wuvafe.pdf
    • http://v2leadership.com/uploads/1/3/0/6/130620222/5528957.pdf
    • http://virginkidsacademy.org/uploads/1/3/0/6/130604850/janisakew-xolitu.pdf
    • http://sagebrushcountryllc.com/uploads/1/3/0/5/130589057/7563397.pdf
    • http://solmitech.net/uploads/1/3/0/5/130541402/megepepaledu.pdf
    • http://bvicryptos.com/uploads/1/3/0/6/130604232/863377f.pdf
    • http://mommymclees.net/uploads/1/3/0/7/130776725/1756625.pdf
    • http://tannerprescott.com/uploads/1/3/0/6/130639439/4836773.pdf
    • http://plantsbyav.com/uploads/1/3/0/8/130874055/9134154.pdf
    • http://elephanteater.org/uploads/1/3/1/4/131437461/zedusoteporotiwajugi.pdf
    • http://clothessaver.org/uploads/1/3/0/4/130483819/xukasonof.pdf
    • http://lilacteahouse.com/uploads/1/3/0/5/130542729/ba6a987d250cb7.pdf
    • http://chastusresidentialcleaning.com/uploads/1/3/0/6/130639764/7380146.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_off00007579.bin
6da239fe031c554d2e662c6b68d89a9e43da90c3f279e7b9e50c4dde9c5a07da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7579 7852 bytes

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