Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ac7421239b16f9a…

MALICIOUS

PDF

68.0 KB Created: 2021-02-14 06:42:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 562399e8721ca363de7f4908f4275ba4 SHA-1: a2e1547deb3947246a3b73bcff780b9454246789 SHA-256: 5ac7421239b16f9a66ca3e96fe121f4f7cfd5cc3782eeb6a980257a56e6cdfff
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://maypoin.ru/wix?keyword=toothpickase+enzyme+lab+answers PDF link annotation
    • https://zozolunefa.weebly.com/uploads/1/3/5/3/135325744/6863630.pdfIn PDF document text
    • http://japadalifu.22web.org/ximofetevivixuvutenarone.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/3001996.pdfIn PDF document text
    • https://bunutawopuzo.weebly.com/uploads/1/3/4/8/134868528/kepefe.pdfIn PDF document text
    • https://cdn.sqhk.co/daxonotetil/jdkpBih/3710610456.pdfIn PDF document text
    • https://cdn.sqhk.co/pofoxubo/uSd0ghc/25728664803.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/xufujofaleki/clubbers_guide_to_99_tracklist.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/15764959228.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/58267730454.pdfIn PDF document text
    • https://s3.amazonaws.com/vonutavekip/tuwanomikukazewo.pdfIn PDF document text
    • https://s3.amazonaws.com/kudowo/51131161699.pdfIn PDF document text
    • http://gelanuvefod.epizy.com/consent_to_receive_electronic_communications_template.pdfIn PDF document text
    • https://s3.amazonaws.com/jefobexapulow/8570036619.pdfIn PDF document text
    • https://s3.amazonaws.com/jifesu/18525911398.pdfIn PDF document text
    • https://s3.amazonaws.com/nigimul/feiertage_bayern_kalender.pdfIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/statement_of_fitness_for_work_template_uk.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_off0000ccf4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF4 5568 bytes
SHA-256: a6190cd837f9c13627320617e4cb3819ebff0d2bd1bb41eb61c55cdcb2636fd6
font_01_sfnt_off0000dfd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD7 10340 bytes
SHA-256: c086fb46c5b757efdd4998df2d82b09a2463e0ef5627129835302495499c6ead