Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ceefa7d63b7178b…

MALICIOUS

PDF

67.5 KB Created: 2021-02-01 01:14:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 2fbae81f613064028a2de6c26b253eff SHA-1: 71f07b855323225e9ee34e0b4d51ca815100162e SHA-256: 7ceefa7d63b7178bf269e465bf6cbd580f36234c4b69337983c4affbf139062e
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://jottigo.ru/aws?utm_term=date+format+sql+example PDF link annotation
    • http://dvestideyli.xyz/small_dutch_tool_chest_plansegj1b.pdfIn PDF document text
    • https://lepefolavexar.weebly.com/uploads/1/3/0/8/130874674/7148922.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406806/normal_5ff6226476c57.pdfIn PDF document text
    • https://nobixerevogug.weebly.com/uploads/1/3/4/4/134481004/ad387a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470982/normal_5fcaa1b62e553.pdfIn PDF document text
    • http://betmoy54.com/70826646240439p9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468551/normal_5fd76e8a0fabb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446931/normal_5ff0679890fb5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485939/normal_5ff8f3e0ecce7.pdfIn PDF document text
    • http://stebsmeh.space/75866352289jsx2o.pdfIn PDF document text
    • https://nevajuto.weebly.com/uploads/1/3/2/6/132695651/9175850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479684/normal_5fc9f06a4261b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494432/normal_5fc9d71313aa0.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/xezujuxoz/zubugalikofomaz.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/international_financial_reporting_standards_wiki.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_off0000cb36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB36 5240 bytes
SHA-256: ee7c53a67094e9cb8a03768a3368309c408174782eaa4793830b39d523a05b76
font_01_sfnt_off0000dd06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD06 10672 bytes
SHA-256: c8ab342423861cf4c3c5c34fda22b7281e711b84ff4d17c8c86c11fe927dc656