Malicious PDF — malware analysis report

Static analysis result for SHA-256 db8bbfb3ad05da5c…

MALICIOUS

PDF

38.3 KB Created: 2020-06-09 06:29:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93cd19363aad40e51e9b309cc5fcf357 SHA-1: 632b20665cf5cfc478e2c2a56572d221206dbf03 SHA-256: db8bbfb3ad05da5c0c18e32677b460e92e26071e9eadcef2cd5f6eaeda589066
62 Risk Score

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, suggesting a link farm or redirection mechanism. The document body, though partially corrupted, contains a URL that matches one of the extracted links, reinforcing the attack pattern. No scripts were extracted from this sample, limiting the ability to determine further payload delivery or execution.

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://1py.undesirable.us/uploads/1/3/1/1/131163898/131163898.html#instala%25C3%25A7%25C3%25B5es+prediais+de+%25C3%25A1gua+quente
    • http://paintermarketer.com/uploads/1/3/1/3/131384656/ginup.pdf
    • http://webmail.juliekgray.com/uploads/1/3/0/8/130874470/pusabumibesumifov.pdf
    • http://mta-sts.mail.billscottguitar.com/uploads/1/3/1/4/131438844/vexog.pdf
    • http://dmomentum.com/uploads/1/3/1/4/131438280/3654299.pdf
    • http://samanthalynnstanton.com/uploads/1/3/0/5/130551129/6915461.pdf
    • http://ginatheman.com/uploads/1/3/0/5/130550890/f3c9ef73.pdf
    • https://pefopireg.files.wordpress.com/2020/06/vamadifanijosigedux.pdf
    • https://zerikofexi.files.wordpress.com/2020/06/9300524774.pdf
    • https://pabozig.files.wordpress.com/2020/06/47375820245.pdf
    • https://polagigeso.files.wordpress.com/2020/06/xuwixanewubirigizaxadezeb.pdf
    • https://vuzenaw.files.wordpress.com/2020/06/700636956.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/
    • https://vuzenaw.files.wordpress.com/2020/06/7006369

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000659f.bin
bea07b45e140f215eba379423452367aa474f6ab701ea4270ff092721f35b8ba		 pdf-font-stream PDF embedded font (sfnt) at offset 0x659F 12776 bytes

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