Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b18821ee2152071…

MALICIOUS

PDF

82.4 KB Created: 2021-02-15 16:13:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: b8b2cd6134a3d8c106f44797ca854726 SHA-1: 560b2ad7bbb7a19629c8cb6b42040195dd6d38bb SHA-256: 5b18821ee21520710436e2bf9e054d387fd74f315188feb8dfd33631b06133ca
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/123?utm_term=husky+8+gallon+air+compressor+pressure+switch PDF link annotation
    • http://nextauto02.ru/67996773042rl116.pdfIn PDF document text
    • https://vobiromab.weebly.com/uploads/1/3/4/6/134653190/ladakowiko-misilijidon-sowuv.pdfIn PDF document text
    • https://mipirizu.weebly.com/uploads/1/3/2/6/132682564/xipogibilibe-tadukusujaxu-fujimosa.pdfIn PDF document text
    • https://povefedonigo.weebly.com/uploads/1/3/1/6/131637150/polupeto.pdfIn PDF document text
    • http://nakidki-alkantara.xyz/ruzituj4wqka.pdfIn PDF document text
    • https://viwekaxirudadax.weebly.com/uploads/1/3/4/7/134700275/5251415.pdfIn PDF document text
    • http://ufenmac.com/13461725620vc6ea.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/lorugipopuxe/unicorn_birthday_invitation_card_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/christ_college_school_uniform.pdfIn PDF document text
    • https://s3.amazonaws.com/tokafanawa/asccp_colposcopy_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/nefemamivon.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/gorole.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/90508094579.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/28653091871.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/bell_bottom_kannada_songs_free.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_off00010371.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10371 5760 bytes
SHA-256: 13dc87991dc92639b00ace434db5893486de24d22f56e6d603abfc4d96cadd3f
font_01_sfnt_off00011703.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11703 11084 bytes
SHA-256: 85fdcf299f03275c840bcc5ffe3b41daa403f8e0c8aa64cc5bb25be27b63371d