Malicious PDF — malware analysis report

Static analysis result for SHA-256 8029957efd26a4bf…

MALICIOUS

PDF

45.9 KB Created: 2020-03-08 08:05:21 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: cafc50379628f9ceebda9e8d21266ed8 SHA-1: 5bee98b93cf0a128551bffe0facf747647622e17 SHA-256: 8029957efd26a4bfd5d11539e93709dfb41e7ee1e64386003911b95c948c9e39
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, a technique often used for SEO spam or to redirect users to malicious sites. The ML classifier strongly indicated maliciousness, and the presence of numerous links to potentially compromised domains supports this assessment. No scripts were extracted, but the document's structure and embedded links suggest it's designed to drive traffic to external resources.

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://0ys5k.bpmtc.com/uploads/1/3/0/8/130814081/130814081.html#can+sjogren%27s+syndrome+cause+lupus
    • http://hostmaster.praxis-salamander.ch/uploads/1/3/0/3/130323173/6026619.pdf
    • http://www.jackiewelch.com/uploads/1/3/0/4/130483819/tizarolobed_kimow_nafunosol_davasuwumum.pdf
    • http://canberracarpco.net/uploads/1/3/0/6/130604826/foloja-sumarimatib-vajawejebosize.pdf
    • http://cigarclubmodesto.com/uploads/1/3/0/5/130539926/8037651.pdf
    • http://denizciyoga.com/uploads/1/3/0/6/130620970/jadakowuwebegan.pdf
    • http://netflixhomeacc1.com/uploads/1/3/0/6/130621757/f5ace0fa.pdf
    • http://fri.center/uploads/1/3/0/4/130483939/519dc4696e53.pdf
    • http://modemarketingsolutions.com/uploads/1/3/0/6/130603932/b5ad083e5f.pdf
    • http://rootfivefarm.com/uploads/1/3/0/2/130270804/jujirasovodaxunus.pdf
    • http://www.aaadentalbahamas.com/uploads/1/3/0/2/130289096/c7a9271c8df2974.pdf
    • http://www.eywines.com/uploads/1/3/0/3/130323449/2ded9645a652.pdf
    • http://seniorlivingday.com/uploads/1/3/0/5/130540406/bebapize.pdf
    • http://asunburntcountryproject.com/uploads/1/3/0/5/130589244/3248588.pdf
    • http://holypostapp.com/uploads/1/3/0/7/130775961/79ad25.pdf
    • http://desatascosbadalona.com/uploads/1/3/0/6/130620173/ravesuwel-doxogewem-xunetazijigugo-pibuduze.pdf
    • http://www.hdigriffin.com/uploads/1/3/0/7/130775570/7237536.pdf
    • http://springbrookaerospace.com/uploads/1/3/0/3/130323291/97694a4e50.pdf
    • http://asapusedcars.com/uploads/1/3/0/4/130475879/6752571.pdf
    • http://thewhittleyfoundation.org/uploads/1/3/0/6/130621695/rowatiraduxeserux.pdf
    • http://nidustheatrearts.co.uk/uploads/1/3/0/3/130323888/wogarexo.pdf
    • http://customsmokingjacket.com/uploads/1/3/0/5/130542948/javaxowutoxenewotug.pdf
    • http://totsville.net/uploads/1/3/0/6/130622116/sofanuwudo_duzuza_badawivusela.pdf
    • http://www.cdmimpresadipulizie.it/uploads/1/3/0/5/130550871/481331.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_off00008821.bin
dc733304de1d20dd8f71ad26fcd48453c560303fd83af6a08debc1959769863d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8821 8356 bytes

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