Malicious PDF — malware analysis report

Static analysis result for SHA-256 110eba6a5814d2d0…

MALICIOUS

PDF

43.2 KB Created: 2020-03-24 16:49:48 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 5f6fc95b2003bc8fb25108b70ab361a9 SHA-1: 8a3c18e1705646fc63b0a70e77664dc5d5b22685 SHA-256: 110eba6a5814d2d0557b3aba9c57b070843cde3897ac152aa25c127220d7acbf
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic. The primary purpose appears to be directing users to a vast collection of other PDF files hosted on numerous domains, likely for SEO spam or to distribute malicious payloads. The ML classifier strongly supports the malicious nature of this PDF.

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://angelwellness.net/uploads/1/3/0/2/130271094/130271094.html#resumen+el+cantar+del+mio+cid
    • http://poshexecutivetravel.com/uploads/1/3/0/5/130590310/2393472.pdf
    • http://avalonlinenrental.com/uploads/1/3/0/6/130604078/nitokiwo.pdf
    • http://kingsmissionsa.life/uploads/1/3/0/6/130621354/f167a6a1cdf3.pdf
    • http://aktivfootwear.com/uploads/1/3/0/5/130590186/fefozujoxavire.pdf
    • http://strigiformae.org/uploads/1/3/0/8/130814900/5031356.pdf
    • http://diamondpta.com/uploads/1/3/0/7/130775646/9fb5317e490a6a.pdf
    • http://inar-web.com/uploads/1/3/0/6/130621836/4933913.pdf
    • http://1saleatatime.com/uploads/1/3/0/8/130874262/1143314.pdf
    • http://vibrs.com/uploads/1/3/0/7/130739456/misobavafewowi_gusafafitipibu_bivexe_kugosekofupo.pdf
    • http://jadejordanswestendacademy.com/uploads/1/3/0/4/130488114/9801637.pdf
    • http://octsummershow.com/uploads/1/3/0/2/130270740/kifavowaliwo.pdf
    • http://www.mingalarfoods.com/uploads/1/3/0/3/130323260/c7c1fb0976.pdf
    • http://www.aiosdagurgentie.nl/uploads/1/3/0/6/130621868/a79abf7a3883b.pdf
    • http://mta-sts.mail.leighcesiro.com/uploads/1/3/0/6/130620892/9418135.pdf
    • http://performanceinfitness.com/uploads/1/3/0/4/130476205/7631245.pdf
    • http://pecinkadumbachferri.com/uploads/1/3/0/2/130288673/nenozoxevibedomogiba.pdf
    • http://ashleighmanning.com/uploads/1/3/0/8/130813818/e5314149e351070.pdf
    • http://rotaract4100.org/uploads/1/3/0/4/130436410/8ef82b7c4.pdf
    • http://www.furkidsandthelaw.com/uploads/1/3/0/5/130550803/8339248.pdf
    • http://nakedroots1.com/uploads/1/3/0/7/130776841/6769922.pdf
    • http://www.raphaelduguay.com/uploads/1/3/0/7/130740207/nijenudidawijawefego.pdf
    • http://www.urbanraj.com/uploads/1/3/1/0/131070567/vowavolefexuditebe.pdf
    • http://innovagreenway.proposals.jll.com/uploads/1/3/0/6/130620956/34ba18f096238a.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_off0000800d.bin
da4e603c977207f46dc05640a301a14eaf9dffe3445fa29e3b69bc7f1189714f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800D 8008 bytes

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