Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eedbaad8569b95b…

MALICIOUS

PDF

81.8 KB Created: 2021-03-13 17:05:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 915bd22e8f1a0d795c4e29f193a6ae31 SHA-1: e0823fdaede84153ffff331cbc561168f4a1752a SHA-256: 4eedbaad8569b95bbcc489f32b2e3992faa2884c8ed5c10e148599d244f35710
254 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/award?keyword=sociology+material+for+upsc+pdf In PDF document text
    • https://cdn.sqhk.co/guranotup/ghcjiia/bkash_send_money_reference.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417536/normal_5ffb4611af6f9.pdfIn PDF document text
    • https://loxogekero.weebly.com/uploads/1/3/4/0/134040689/3196243.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_5fe250022e74b.pdfIn PDF document text
    • https://rejobasagiletez.weebly.com/uploads/1/3/4/6/134642313/kotube_wewes_zesapigep_gawafurexogaju.pdfIn PDF document text
    • https://cdn.sqhk.co/zagakobafot/Jhbiijj/63803087107.pdfIn PDF document text
    • https://jizufozerujit.weebly.com/uploads/1/3/4/3/134343201/vawixetopuwurul-bajirexokabawu-zaxepadugekut-zowuravabom.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473947/normal_60403e6ceb702.pdfIn PDF document text
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/jomas.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/mubemutolewe/ingenuity_automatic_bouncer_wont_bounce.pdfIn PDF document text
    • https://s3.amazonaws.com/boxalewijim/free_language_arts_worksheets_2nd_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/kendo_grid_column_field_template_angular.pdfIn PDF document text
    • https://s3.amazonaws.com/jidosatikim/74674137835.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/kali_linux_2020.3_vmware_download.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/birizi.pdfIn PDF document text
    • https://s3.amazonaws.com/napejaxosinages/togaliwaba.pdfIn PDF document text
    • https://s3.amazonaws.com/tizowodifi/rovavowin.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/free_firefox_51._0._1.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_off00010076.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10076 5680 bytes
SHA-256: e60c661659578ec47f1f5242354c801c1dcdde2217bb0efdd3c94c279d03d376
font_01_sfnt_off000113c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C2 11224 bytes
SHA-256: 53fa7a9215444f7554f6289e218434c7c17a8f80c31b2104b0e31014b38c5ff1

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