Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2566d0cf591d18b…

MALICIOUS

PDF

39.7 KB Created: 2020-05-20 15:53:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3235ef4c0cb449aa452bf54dca648bc2 SHA-1: ba1e727a7b883f3592e18ef7b3cbe5f0df7e931b SHA-256: e2566d0cf591d18b2519527e5c311ae3a8bf2889d0d370e99b7584344983cd38
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF document was flagged by a machine learning classifier as malicious. It contains a significant number of external links, many of which point to other PDF files hosted on various domains. This behavior is consistent with SEO link farming or a redirection scheme to distribute malicious content. The document body itself contains garbled text and references to 'wkhtmltopdf', suggesting it may be a generated document rather than a user-facing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://cv-cc.com/uploads/1/3/0/7/130776847/130776847.html#microciclos+mesociclos+y+macrociclos
    • http://banzaiwraps.com/uploads/1/3/1/1/131164519/acb6b3f7.pdf
    • http://footplayusa.com/uploads/1/3/0/3/130313324/woriw-sipojemenujinar-leneku.pdf
    • http://elkcreekwinery.shop/uploads/1/3/0/6/130605475/011ae96.pdf
    • http://framingmediadevelopment.com/uploads/1/3/0/5/130540134/2664124.pdf
    • http://mybioproject.com/uploads/1/3/0/5/130545733/c02374cdf1ac5d.pdf
    • http://intelligentia-bi.co/uploads/1/3/1/6/131606056/jofinaw_piturur_zagoworiru.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_off0000695a.bin
699b5f088d473e043b790829bca9847d5b6181ec62cc7f6bf27faaf64d327237		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695A 12560 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.