Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee01e787de6037bd…

MALICIOUS

PDF

36.3 KB Created: 2020-04-10 10:06:39 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 2bda0754d90a9aab6e849bd7267c3167 SHA-1: bb4254f8d65e4021ce8b814abe9f9117250917a1 SHA-256: ee01e787de6037bd7b917267b025c73d064e1c0b8a2171e8138ae39e783a21a1
96 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 obfuscated with numeric slugs, characteristic of SEO link farm techniques used to drive traffic to malicious sites. The document body mentions 'Cheryl krueger net worth', likely a lure to entice users to click on the embedded malicious URLs. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a phishing or traffic redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://phishphood.net/uploads/1/3/1/6/131637062/131637062.html#cheryl+krueger+net+worth
    • http://bennettdaltonlaw.com/uploads/1/3/0/5/130541465/kaxutamobu-kapugujawetinex-lusaz-xozorabekudolow.pdf
    • http://prohile.org/uploads/1/3/0/5/130544091/mudotopedasumux-zelepafabetugi-bokafagu-sotobofazedigu.pdf
    • http://delfinahealth.com/uploads/1/3/0/5/130543684/tugiwedenuloliwodu.pdf
    • http://whitewaterhomesyukon.ca/uploads/1/3/1/3/131382430/28f5a9322780c5.pdf
    • http://eurushomes.com/uploads/1/3/1/4/131406427/6dc22d72be65.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_off00006570.bin
8ea79200425874cbf3194da1f93fdefc5526b03af9364aaf81062f5ad9de0ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6570 8152 bytes

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