Malicious PDF — malware analysis report

Static analysis result for SHA-256 de7b8d152fade34f…

MALICIOUS

PDF

38.6 KB Created: 2020-03-31 02:13:15 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 06784dc8c111a5b0ff80aaafcc256088 SHA-1: 0d9f5d788b4a1690065b0c6b9c4d08f9d4f9c4af SHA-256: de7b8d152fade34f0fa94670ad5c615d27017d374158e0e4b18a875220fd5f5d
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, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. The document body, though heavily obfuscated, contains a reference to 'Partido de america de cali hoy' and includes the primary malicious URL. This suggests the PDF is part of a link farm or SEO spam campaign, designed to drive traffic to a network of sites, potentially for phishing or ad fraud.

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://hitekmaster.net/uploads/1/3/0/6/130605113/130605113.html#partido+de+america+de+cali+hoy
    • http://shadedpines.com/uploads/1/3/0/7/130775734/47fbd3c784.pdf
    • http://deltainspirations.com/uploads/1/3/0/2/130271035/561803.pdf
    • http://rpdenali.com/uploads/1/3/1/3/131398378/voninogu.pdf
    • http://lakegenevapsychologist.com/uploads/1/3/0/4/130489123/9561876.pdf
    • http://markwick.com/uploads/1/3/0/7/130738754/bilitenigaxek.pdf
    • http://padenpierry.com/uploads/1/3/0/6/130604032/tijatarasaxef.pdf
    • http://designpreviewer.com/uploads/1/3/0/4/130483248/lenokelu.pdf
    • http://5girlsdad.com/uploads/1/3/0/7/130776100/7794595.pdf
    • http://ivyrhodes.com/uploads/1/3/1/3/131381521/7e8a2.pdf
    • http://soultriggerpdx.com/uploads/1/3/1/3/131380263/zedotegukejemig.pdf
    • http://livinglifedifferent.com/uploads/1/3/0/8/130813314/jiwonugefala.pdf
    • http://brydgescpa.com/uploads/1/3/0/6/130640136/kanajonoxida.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_off000067ea.bin
8b5f89fe41871e3360213a3734bf0a75512826169f2d2dd548504747fe4d1b3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67EA 10060 bytes

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