Malicious PDF — malware analysis report

Static analysis result for SHA-256 478cbce03e6f152d…

MALICIOUS

PDF

77.4 KB Created: 2021-03-30 23:40:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 5f7f1077e0930ac5386d0d475a8227b9 SHA-1: d3ac918f57e5c0880b2c5e192d36b6eaa5cd3685 SHA-256: 478cbce03e6f152d420ceba41f82b6ed5f74e41b6c3dd9c5d657d03760f2ad76
196 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous external links, with a critical heuristic identifying a link farm and an SEO redirector. The primary external URL, 'https://xajibur.ru/wix?keyword=ensoniq+eps+16+plus+rack+manual', is likely used to direct users to malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to exploit users through deceptive content and external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://xajibur.ru/wix?keyword=ensoniq+eps+16+plus+rack+manual PDF link annotation
    • http://natlab.ru/65634002225xsiyd.pdfIn PDF document text
    • http://blu-ital.space/polevubomesoxifiwonajlsrx.pdfIn PDF document text
    • http://streamsweets.com/simplicity_riding_mower_tireswvo8r.pdfIn PDF document text
    • http://telemprom.xyz/165995199381talb.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/zafijukopa/74134392774.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/turbochef_oven_cleaning.pdfIn PDF document text
    • https://cf4de027-7369-46c2-bf93-d69cabef2b5e.filesusr.com/ugd/868b90_5de9af442ba64eb896bd10b22e8e464a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b1191d4-77be-45de-b1a5-3500df71a627/garmin_gpsmap_78s_handheld_gps_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/jinotugiwomo/character_certificate_format_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdc5d5b7-cb7a-47ad-9689-6e0a5bdfc7ce/fonulizolo.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_df4b92005b4841cfa1a2058870b77491.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_3e870a7641d449459a3b20955f740fc3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/703a3648-2bf0-4847-9707-c63b61f6453b/kuwodo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19e01935-4b43-4dbf-a853-69bbdcdc7c7d/lamuvikulo.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/33178422566.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/655ecbda-f4e5-42eb-a148-0fff81189d01/wovuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/93590119603.pdfIn PDF document text
    • https://eee5dff6-7331-416e-acdf-593d0c386862.filesusr.com/ugd/21e9e0_fbd0a84a4ac048379807ff3bd74ef2f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/nobuxazerunepimejusovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e500d1c4-9f7e-461e-a2d3-60b90ad4962e/kenmore_elite_washer_and_dryer_accessories.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2463b6d1-e1cc-430d-9475-e208c75a854a/jensen_vx7020_navigation_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/diwitapezu/64241296238.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/bifopobava.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9986d06-bd9f-485a-98c8-017b2b59c1c1/74492399167.pdfIn PDF document text
    • https://18aefb47-0221-41c7-ace0-4f78eb33e730.filesusr.com/ugd/bca722_7c8c142496b44cc1abdfdf9e815358a5.pdf?index=trueIn 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_off0000ef5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5D 5432 bytes
SHA-256: 2fdc2a87a890d6488b127158974f6d63a387bbcb5e54574db1d152f573c134ef
font_01_sfnt_off000101d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D4 11340 bytes
SHA-256: f9476b33a588680f218446f579cd53085a030acdddfa260a91dea4a33dc087cf

Open this report in the interactive analyzer, or submit your own file for analysis.