Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4ba78eb90f8dca9…

MALICIOUS

PDF

37.6 KB Created: 2020-06-03 01:03:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f676cfd216a078f2b1e85e911abc1681 SHA-1: 0ea3a3448014b566cc2b7eca0577b5f8ef535e79 SHA-256: d4ba78eb90f8dca9c59c41df2d4397580eaa00d8dcbf960ff48400e9a1a4fc07
94 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. The document body, though heavily obfuscated, contains references to these external URLs. The primary function appears to be directing users to a network of potentially malicious or SEO-manipulated websites.

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://kanegroup.voyagerwebsites.com/uploads/1/3/1/4/131482823/131482823.html#yuval+noah+harari+sapiens+kratka+povijest+%25C4%258Dovje%25C4%258Danstva
    • http://itreadswell.com/uploads/1/3/0/2/130272600/xawuro_dirit_rixalivigavameg_sebojanapojupeb.pdf
    • http://pursanovaaz.com/uploads/1/3/0/7/130776149/bee36d3.pdf
    • http://endgunx100.com/uploads/1/3/0/6/130639481/155141.pdf
    • http://andriaandkurt.com/uploads/1/3/0/6/130621473/gusogeruruloro_majog.pdf
    • http://dojofernandoalonso.nl/uploads/1/3/0/6/130640097/bipiximabiva.pdf
    • http://deinma.net/uploads/1/3/1/4/131438323/fomil.pdf
    • http://minigaragem.com/uploads/1/3/0/5/130551001/wenigasulejoga.pdf
    • http://elmore-enterprises-llc.com/uploads/1/3/0/7/130776571/refazorabo-nobivuwame.pdf
    • http://thesoundmusicgroup.com/uploads/1/3/0/9/130969862/tepuvovazuzagit-ravopo.pdf
    • http://kanegroup.voyagerwebsites.com/uploads/1/3/1/4/131482823/terms.html
    • http://kanegroup.voyagerwebsites.com/uploads/1/3/1/4/131482823/dmca.html
    • http://kanegroup.voyagerwebsites.com/uploads/1/3/1/4/131482823/policy.html
    • https://jubowut.files.wordpress.com/2020/05/6051981583.pdf
    • https://boduwifa.files.wordpress.com/2020/05/15493402335.pdf
    • https://vurizuzuni.files.wordpress.com/2020/05/dovafovawilowuloxuluvok.pdf
    • https://gozikes.files.wordpress.com/2020/06/90556205078.pdf
    • https://bafiretuv.files.wordpress.com/2020/05/30324001830.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/
    • https://gozikes.files.wordpress.com/2020/06/90556205078

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006309.bin
bebbd2018ebce77f852c4125f2d6334014974b410ef9faa8d05e8b71028dfa40		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6309 11456 bytes

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