Malicious PDF — malware analysis report

Static analysis result for SHA-256 7dafac04a9ad3e86…

MALICIOUS

PDF

67.7 KB Created: 2021-02-22 06:40:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b1219dbfe8e8b51a3e98976f4e364626 SHA-1: dc0649ab58f98b45126c764a377703d655698fec SHA-256: 7dafac04a9ad3e86f487593347406aea042630a93cfcd6d073c5d7d4c9e0321b
204 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/wix?keyword=loudoun+county+school+calendar+2020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4451229/normal_5ff61225869fe.pdfIn PDF document text
    • https://worijuxadije.weebly.com/uploads/1/3/4/8/134863955/zarokijiz.pdfIn PDF document text
    • https://cdn.sqhk.co/lopokevofoti/eiaKIif/menejoxuxipulomega.pdfIn PDF document text
    • https://sekowuwumobof.weebly.com/uploads/1/3/5/3/135394032/makexej.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366050/normal_60097950e51cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426059/normal_5ffbbbf636446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501789/normal_5fe917517b7e6.pdfIn PDF document text
    • https://nimukitu.weebly.com/uploads/1/3/4/2/134266418/7361790.pdfIn PDF document text
    • https://cdn.sqhk.co/savunowudob/aTgjhiG/97699982389.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/vivuwokemibazirizi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384634/normal_5fe4e8a9c4d63.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/idSHYif/robot_superhero_champions_mod_apk_1._0._52.pdfIn PDF document text
    • https://koxowuberes.weebly.com/uploads/1/3/1/3/131379375/jefatetaxet.pdfIn PDF document text
    • https://xiguvopumodajux.weebly.com/uploads/1/3/1/3/131381006/2308626.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zolibexusago.epizy.com/pewozevafamututokumegi.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_off0000cb2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB2D 5344 bytes
SHA-256: 83cbccb4932b2b809e1d9df758792f474feaf03e6d7ef1be4a424d93294454f2
font_01_sfnt_off0000dd58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD58 10776 bytes
SHA-256: 30db6879d8bb17623870d1b817bfc5594157a434c7bd021ff58e4462cea99bbc