Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d73f0e32e2df765…

MALICIOUS

PDF

73.0 KB Created: 2021-01-24 04:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4fd1922195ff2a5b559bf3d95bd9be47 SHA-1: 6e15e2501c49d38638b4dc10e9dbd1f8c679f02f SHA-256: 4d73f0e32e2df7650fd5158e32a4df89576e2bfcc5f34526f028bd91e945565e
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://baarspo.ru/123?utm_term=what+is+the+main+idea+of+the+drive+theory PDF link annotation
    • https://site-1168368.mozfiles.com/files/1168368/jixakenazisomitis.pdfIn PDF document text
    • https://site-1177743.mozfiles.com/files/1177743/siberian_tiger_facts_for_kids.pdfIn PDF document text
    • https://site-1177042.mozfiles.com/files/1177042/64832855108.pdfIn PDF document text
    • https://site-1177382.mozfiles.com/files/1177382/evacuated_container_baxter.pdfIn PDF document text
    • https://cdn.sqhk.co/bigulikexupa/ijdiije/winabogonemadezuj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418368/normal_5fdfa0d64def6.pdfIn PDF document text
    • https://site-1174029.mozfiles.com/files/1174029/roll_up_banner_design_psd_free.pdfIn PDF document text
    • https://cdn.sqhk.co/tesuvifiv/bjcgjkQ/352242014.pdfIn PDF document text
    • https://site-1176360.mozfiles.com/files/1176360/jewix.pdfIn PDF document text
    • https://site-1178914.mozfiles.com/files/1178914/doromafemarojodogipa.pdfIn PDF document text
    • https://cdn.sqhk.co/lexebogefaj/dSLZsji/lolaxilege.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/Esjj9ll/tatoboz.pdfIn PDF document text
    • https://site-1166608.mozfiles.com/files/1166608/henri_cartier-_bresson_decisive_moment.pdfIn PDF document text
    • https://site-1250323.mozfiles.com/files/1250323/zasubupujinazo.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/xukisagazeves-dusevadadipul-raxefisefaxe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dfa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA8 5288 bytes
SHA-256: f59ce8f8249d3785dfe67c492e5f2f1142e07976dc9f30f8bc063919315378ce
font_01_sfnt_off0000f18d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF18D 11044 bytes
SHA-256: 8c297f0f2602bc49257407c4a04c4b8819315a57a8adbb1dbcf41626aed7d8ea