Malicious PDF — malware analysis report

Static analysis result for SHA-256 543911c95f6fffaf…

MALICIOUS

PDF

40.6 KB Created: 2020-04-25 22:13:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 90d3076b6275eebdb1e83425359361cc SHA-1: 2cae6496181dd5488febc31a4610bdfb23a32023 SHA-256: 543911c95f6fffaf6945dea4231f4746af2e4a0a4c9c191b75e2ad9ed0b71cd1
62 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The document body, though heavily obfuscated, contains text related to 'Aparato respiratorio pdf anatomia y fisiologia' and mentions 'wkhtmltopdf', suggesting a lure document. The heuristic 'PDF_SEO_LINK_FARM' strongly indicates a malicious intent to generate traffic or distribute further content through a network of linked PDFs.

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://highshinepaint.com/uploads/1/3/0/6/130639877/130639877.html#aparato+respiratorio+pdf+anatomia+y+fisiologia
    • http://monsehernandez.com/uploads/1/3/0/2/130289393/dufuxotuluv_lebime_lisusugow.pdf
    • http://ersfinancial.com/uploads/1/3/1/4/131454158/fe9a67acb492.pdf
    • http://walkaboutfarmfurniture.com/uploads/1/3/0/5/130551144/ddb34e99eb.pdf
    • http://resistingantichrist.com/uploads/1/3/1/4/131438025/xunosaje_mafojapesoloze.pdf
    • http://choc4kids.com/uploads/1/3/0/7/130739648/magonisativawajuf.pdf
    • http://digitalharborconsulting.com/uploads/1/3/0/5/130542940/6919651.pdf
    • http://summitsalesrecruiting.com/uploads/1/3/0/5/130550696/5161928.pdf
    • http://sydneyprivategeriatricians.com/uploads/1/3/0/5/130590158/b4adecd2a0.pdf
    • http://partsnet.ca/uploads/1/3/0/2/130287229/mefijenezaf.pdf
    • http://digitalharborconsulting.co
    • 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_off000074b4.bin
09a8b5770f0a4ddf56dcc697e2f6cb19d94b89be5d9b22fdda0dc9543603ef4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74B4 9056 bytes

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