Malicious PDF — malware analysis report

Static analysis result for SHA-256 2547990f812e8bac…

MALICIOUS

PDF

74.5 KB Created: 2021-02-21 19:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 96554bcde80d915ade92116d7f7320a1 SHA-1: 52c905efdcda3588c5f3c5fa07e968d0b4ed2a12 SHA-256: 2547990f812e8bacb736ebc7dd26d2532399d12dcea213033f26497536775a48
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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 https://druttle.ru/strik?utm_term=buffalo+wild+wings+nutrition+guide+cauliflower+wings PDF link annotation
    • https://wawotisusuwo.weebly.com/uploads/1/3/2/7/132741293/lovajetoboped.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488322/normal_602a34ff07c54.pdfIn PDF document text
    • https://nafeziwubiwodi.weebly.com/uploads/1/3/1/3/131379183/b3ad546d45da08.pdfIn PDF document text
    • https://wobufijurix.weebly.com/uploads/1/3/1/6/131607063/gukupefidesevat-rinosaxuve-ginipixule-sisedibebadek.pdfIn PDF document text
    • https://gajuleli.weebly.com/uploads/1/3/1/8/131871701/fenadunudaxo.pdfIn PDF document text
    • https://veguxalefimas.weebly.com/uploads/1/3/1/3/131382166/809181.pdfIn PDF document text
    • https://sivikowililip.weebly.com/uploads/1/3/4/5/134599649/litufidudorelur.pdfIn PDF document text
    • https://juwizezajofop.weebly.com/uploads/1/3/1/6/131637218/1822149.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/41814037897.pdfIn PDF document text
    • https://s3.amazonaws.com/pirofopafu/67471850336.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/fapipibamixilaputaziket.pdfIn PDF document text
    • https://s3.amazonaws.com/vebisop/ipl_2019_match_schedule_time_table.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/jotomodulat.pdfIn PDF document text
    • http://dazenuf.rf.gd/41167450074.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/swot_analysis_template_excel.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE507 5328 bytes
SHA-256: f6c7663059e3e9521eee02dc5876bc2c420241bd7b340e4c900ce0f54f0a3b7f
font_01_sfnt_off0000f753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF753 11176 bytes
SHA-256: d88874e3d37604173c84166415717a1a25c6b995900053dd421c357e5f73d547