Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca2a2d0c1893032d…

MALICIOUS

PDF

70.9 KB Created: 2021-01-23 19:11:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 1a808ec10e2cfebad2954fc9e9d6b6b8 SHA-1: a034a3c6a6fcc6db944250a63b29999126815f53 SHA-256: ca2a2d0c1893032d3515f282587b6a8ac00daf333c19bf61c8d21beb95e729d9
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wb?keyword=wink%20emoji%20gif%20transparent PDF link annotation
    • https://site-1198856.mozfiles.com/files/1198856/bowojiloxu.pdfIn PDF document text
    • https://dinijituwit.weebly.com/uploads/1/3/1/6/131606252/bixavogom.pdfIn PDF document text
    • https://genebametujo.weebly.com/uploads/1/3/4/9/134904617/6820080.pdfIn PDF document text
    • https://pegigisujojefuf.weebly.com/uploads/1/3/1/4/131413718/tenoxilufefosoloka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465142/normal_5fe60fefbdad3.pdfIn PDF document text
    • https://jinitemolo.weebly.com/uploads/1/3/1/8/131856214/tuxas-dupip-bipovokofa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407983/normal_5fde395970b46.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420239/normal_5fdd339f9ea12.pdfIn PDF document text
    • https://tamaxanafe.weebly.com/uploads/1/3/1/8/131856242/dexipenuzuvikoxo.pdfIn PDF document text
    • https://site-1167973.mozfiles.com/files/1167973/gizemuzujumotanaretar.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_600a00d42bdb6.pdfIn PDF document text
    • https://site-1177793.mozfiles.com/files/1177793/xagegug.pdfIn PDF document text
    • https://vuzavadakugodo.weebly.com/uploads/1/3/4/8/134857872/negelov_kiwokibiwefu_wowipavisifo_maroxe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450247/normal_5ffadbfd3b504.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/luropi/mumiworamaxovul.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_off0000d69d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69D 5340 bytes
SHA-256: f3763567eba00d12058ecaf7d9e61b7b43d6413814f0c4e9b8ce2ce751c2661b
font_01_sfnt_off0000e8d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D2 11436 bytes
SHA-256: 970d8adc3d4433b8ed5bb2ec01d39c6dc5f025f2c9d1e8d58b3c096fbbfcbcd0