Malicious PDF — malware analysis report

Static analysis result for SHA-256 e20a2ea3b3aa761c…

MALICIOUS

PDF

43.0 KB Created: 2020-03-30 05:54:00 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: ab5f248385551a2d9638d0be3a22caa1 SHA-1: 28bda7222f711107b9a9a395f6d3027a80a694f9 SHA-256: e20a2ea3b3aa761c5195630660345963fb294e289cbc87e5e177935caf4fffe9
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF contains a large number of external links, many of which point to other PDF files hosted on similar domains. This pattern is indicative of a link farm or a lure to download malicious content. The heuristic 'PDF_SEO_LINK_FARM' strongly suggests this is an attempt to manipulate search engine results or distribute malicious files disguised as legitimate documents. The ML classifier also flagged this PDF with high confidence.

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://carpetcleancary.com/uploads/1/3/0/8/130814591/130814591.html#configurar+filezilla+server+para+acesso+externo
    • http://jointeamstrong.com/uploads/1/3/0/3/130323328/5121764.pdf
    • http://kelseyleonofficial.com/uploads/1/3/0/2/130271058/6873769.pdf
    • http://sisterpeterduck.com/uploads/1/3/0/7/130775129/9674c4458a12.pdf
    • http://warnercrawford.com/uploads/1/3/0/8/130874298/tiwoda.pdf
    • http://mayahairstonslampoetry.com/uploads/1/3/0/6/130621444/7686343.pdf
    • http://michaelvincentportfolio.com/uploads/1/3/1/3/131379844/4ecd3.pdf
    • http://bloomingbegonia.com/uploads/1/3/0/4/130476672/5498624.pdf
    • http://puertovallartaflowers.com/uploads/1/3/0/8/130874397/1bac031eee3.pdf
    • http://iboart.be/uploads/1/3/0/4/130476556/jorezotifex_sumaledo_wavat.pdf
    • http://elitedesignshoppe.com/uploads/1/3/1/0/131070895/sevevuwamagedi.pdf
    • http://warmanddryuk.com/uploads/1/3/0/8/130814588/nefivem.pdf
    • http://frontlinefireprotection.org/uploads/1/3/0/6/130620618/3653159.pdf
    • http://sellitfastproperties.com/uploads/1/3/0/6/130605302/5715323.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_off00007ddd.bin
7dcdfb9924986f12b2a0e95198e730d3bfc735463f8ec7748385f12d670a39f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7DDD 9776 bytes

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