Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ee9d28752b7459c…

MALICIOUS

PDF

40.6 KB Created: 2020-04-04 08:22:25 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 9e52f9a64fae829343b623ad541dc820 SHA-1: 3aabc2f4b9a79629058013aa677cc970cf4ad243 SHA-256: 0ee9d28752b7459c3c389a26e0d62779dc5067762557e7c3de7d0699d0cabd80
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

The PDF contains a large number of embedded external links to other PDF files hosted on various domains. This behavior is indicative of a link farm or a mechanism to distribute malicious content or redirect users to phishing sites. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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://ogcandy.com/uploads/1/3/0/2/130272500/130272500.html#concepto+de+relaciones+humanas+segun+diferentes+autores
    • http://exploretheshore.org/uploads/1/3/0/9/130969608/jedevibuvegiselebu.pdf
    • http://ghinteraction.com/uploads/1/3/0/4/130436163/2509994.pdf
    • http://thenakedwrist.com/uploads/1/3/0/5/130550652/pozoto.pdf
    • http://woooah.sg/uploads/1/3/0/3/130324167/f5b5b9f.pdf
    • http://www.asairconsulting.com/uploads/1/3/0/6/130639484/99ebfb0e4b1ca.pdf
    • http://lexingtoncoffeeco.com/uploads/1/3/0/9/130969768/6792904.pdf
    • http://comitatoamicivialeandreadoria.com/uploads/1/3/0/4/130488163/pijakojorar-jamudi-jubemusir-wafizuvaxe.pdf
    • http://nightbeachpearls.com/uploads/1/3/1/0/131070866/ca8fb68c109b7.pdf
    • http://youdrivemetodrink.com/uploads/1/3/0/5/130589050/noxedan.pdf
    • http://rojasdesign.net/uploads/1/3/0/6/130621075/3211805.pdf
    • http://frankmanningmft.com/uploads/1/3/0/8/130813533/4647722.pdf
    • http://haresfarm.ca/uploads/1/3/0/9/130969704/5188863.pdf
    • http://officiallygolden.com/uploads/1/3/0/7/130738661/414902.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_off000074a2.bin
b7a290c9c0eb67286c6cac85dc04fff27205e2e556632c63682e7f7da52ce932		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74A2 8324 bytes

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