Malicious PDF — malware analysis report

Static analysis result for SHA-256 dca0a575bcce2877…

MALICIOUS

PDF

71.8 KB Created: 2021-02-15 10:42:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 30e9b98889c478abe68144b3bbb51992 SHA-1: d84484ece748d290db8e51fb65751f17c26c3432 SHA-256: dca0a575bcce2877348e4f7bc540167b7874cde024117d2936f10768ecbef888
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://leonvi.ru/123?utm_term=technical+support+interview+questions+and+answers+for+freshers+in+ibm PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411490/normal_5fcb2c815c2ce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368492/normal_5ff2fd0eb69a9.pdfIn PDF document text
    • http://apple-fruit.space/521093608482beer.pdfIn PDF document text
    • https://kavosoxevab.weebly.com/uploads/1/3/0/8/130874108/fikupukagefom.pdfIn PDF document text
    • http://wspring.space/download_granny_chapter_2_outwitt_mod_apkb2tn8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384307/normal_5fdc0bbd01228.pdfIn PDF document text
    • http://tiktoktop.design/carte_gaspsiezppbj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447669/normal_5ff4a94ab25df.pdfIn PDF document text
    • http://cosmosqrab.online/juwawaderamuvogetukasasa8kqw1.pdfIn PDF document text
    • http://cmb-accueil.com/fapozezuxixesemuv7jesa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_600e48084a559.pdfIn PDF document text
    • http://m-ryanaf.site/795545359116en3l.pdfIn PDF document text
    • http://masterpowerpoint.com/lesiketunajitesexhyrm0.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/xujitezu/sheets_on_the_line_hawksburn.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/minecraft_industrial_craft_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/sowirutelevolur/85641446061.pdfIn PDF document text
    • https://s3.amazonaws.com/xubifupi/simple_zero_hour_contract_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/bexley_grammar_school_sixth_form_dress_code.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_off0000d93a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD93A 5764 bytes
SHA-256: c6332fa172202d238cae5530ee478e773e4f56a847355c1796a65b86ee6621a2
font_01_sfnt_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 10832 bytes
SHA-256: 9521a341e50e41ca1489c09d40a1a6ee63501ed9ea6dd55fbb87eb40bc411da0

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