Malicious PDF — malware analysis report

Static analysis result for SHA-256 07ab10e4764376cd…

MALICIOUS

PDF

47.3 KB Created: 2020-04-03 12:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 6f7d1e69f76a12fd407951555c89b571 SHA-1: 99017f895329cede72c99d76ff865d6eeef98f6c SHA-256: 07ab10e4764376cdff4ec45349ef73cf0ff8e9c434521fea6b078b37456a2636
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various domains, many of which appear to be part of a link farm. The ML classifier also strongly indicated maliciousness. The primary purpose appears to be directing users to a network of websites, likely for SEO manipulation or to serve further malicious content.

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://autumnbasinger.com/uploads/1/3/0/5/130543106/130543106.html#cuales+son+los+elementos+que+integran+el+lenguaje+visual
    • http://sjuartgallery.com/uploads/1/3/0/6/130639037/5204821.pdf
    • http://glameventsbylpb.com/uploads/1/3/0/6/130621333/3110228.pdf
    • http://calmingconnectionsmassage.com/uploads/1/3/0/5/130550880/61753d4f.pdf
    • http://kreativanders.com/uploads/1/3/1/0/131070331/5907431.pdf
    • http://kanoaphotography.com/uploads/1/3/0/2/130289270/0ee14b6963.pdf
    • http://billing.themobilepcguys.com/uploads/1/3/0/6/130639936/zonorezabu.pdf
    • http://pattyjay.com/uploads/1/3/0/5/130590244/jokugulug_nakuve_munisoso.pdf
    • http://cordivanoapparel.com/uploads/1/3/0/5/130545278/gafokukubajedek.pdf
    • http://misiupapier.com.au/uploads/1/3/0/4/130489418/jabojuted-towabox-roxovok-wewapekojev.pdf
    • http://colorblind.tv/uploads/1/3/0/5/130589297/3097651.pdf
    • http://sanmarcoscaconcrete.com/uploads/1/3/0/3/130324207/fifewusasirugeni.pdf
    • http://orangecountyspacover.net/uploads/1/3/0/7/130775826/wigebigifatixeka.pdf
    • http://kempercpa.org/uploads/1/3/0/5/130539885/2134132.pdf
    • http://nodaysoffalthletics.com/uploads/1/3/0/6/130639370/luterawavejonofaz.pdf
    • http://msbr.ca/uploads/1/3/0/7/130775970/6757179.pdf
    • http://burzykowski.net/uploads/1/3/0/6/130605291/rudakim_jemawaki_pegelobuwolefi.pdf
    • http://yogabyamandaretreats.co.nz/uploads/1/3/0/5/130588874/59b0ac7dca.pdf
    • http://3dwildrags.com/uploads/1/3/0/6/130620490/jobekinot-nimugewedewa-wegaferuza-xupefejadezinan.pdf
    • http://tnpcdc.org/uploads/1/3/0/5/130550729/pujijo_pobuv_sewetomu.pdf
    • http://genexo.org/uploads/1/3/0/5/130589020/wejabakibumuturitix.pdf
    • http://ehstowertimes.com/uploads/1/3/0/5/130588363/nomeveroxejilaba.pdf
    • http://carlicoboutique.com/uploads/1/3/1/4/131406387/7942971.pdf
    • http://elitepaintingcleaningandmore.com/uploads/1/3/0/2/130272932/mulaneviwiba.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_off00008d21.bin
ac3876576a3cf3418496de5aab84e0035986a42d87238481ba55e57883ea88bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D21 8732 bytes

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