Malicious PDF — malware analysis report

Static analysis result for SHA-256 a06a1466382ac342…

MALICIOUS

PDF

73.3 KB Created: 2021-01-22 01:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: eb7b293dcdb73b0a882baf49dc9ef67e SHA-1: e56ea66efedf1ad8e7a48347b3f5419fcbc367e6 SHA-256: a06a1466382ac3428b4c5c5173041b74c0a5818cf5899ffd129a178eb876b760
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wb?keyword=synonym%20sheltered%20employment PDF link annotation
    • http://vezagoxutejoza.66ghz.com/bourns_potentiometer_datasheet.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376098/normal_5fecc0699e882.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ff81353e0b3e.pdfIn PDF document text
    • https://subilitukufune.weebly.com/uploads/1/3/4/6/134629352/7814548.pdfIn PDF document text
    • https://fowaloxew.weebly.com/uploads/1/3/4/8/134881160/5715495.pdfIn PDF document text
    • https://sowekunozo.weebly.com/uploads/1/3/5/3/135321923/jugesekibafifed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468550/normal_5fd2a07fa85a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478687/normal_600346ebaa8b7.pdfIn PDF document text
    • https://xafusotegemuwif.weebly.com/uploads/1/3/5/3/135304795/menetakasurex.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/nerugiraxura/php_apache_server_free.pdfIn PDF document text
    • http://gitogopafo.epizy.com/29006478273.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/78458400010.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/milk_makeup_blotting_sheets.pdfIn PDF document text
    • http://kofukobekageja.epizy.com/t_c_marsh_middle_school_uniforms.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/free_compatibility_report_birth_times.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_off0000e09a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE09A 5196 bytes
SHA-256: d8c831ee73f15690eb989a85bd350c1b3e59c22e01f0269bec4fb7e4bc7e2ebb
font_01_sfnt_off0000f224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF224 11436 bytes
SHA-256: d505cca514d9f06db463e598ad153cc44b4b45933afc4343182cc53c1dd9b4d9