Malicious PDF — malware analysis report

Static analysis result for SHA-256 5140a7d328e58a06…

MALICIOUS

PDF

61.8 KB Created: 2021-02-15 11:06:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: ae1b078fb563c7389c3154a9bad2c049 SHA-1: 0acc4d009d0a94c35d0561a33d5389f6a32cdd34 SHA-256: 5140a7d328e58a0619cc16993188750983c587211572dbec70360bc2aeab426c
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • 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://druttle.ru/wix?keyword=police+lines+cad PDF link annotation
    • https://cdn.sqhk.co/zuxosutuku/ezNKie8/flow_free_download_windows_10.pdfIn PDF document text
    • https://cdn.sqhk.co/vugiboba/icgcOj9/80312606327.pdfIn PDF document text
    • https://zoxaminajoge.weebly.com/uploads/1/3/1/6/131637873/7957470.pdfIn PDF document text
    • http://jenenirefu.iblogger.org/91006382878.pdfIn PDF document text
    • http://xigobaxubegozuv.22web.org/79143357198.pdfIn PDF document text
    • https://bogobesupagal.weebly.com/uploads/1/3/0/7/130775478/safifutatu.pdfIn PDF document text
    • https://cdn.sqhk.co/favejofu/hcieidn/mobixed.pdfIn PDF document text
    • https://lodufifed.weebly.com/uploads/1/3/1/4/131411197/72795b96dea9.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/iihblgi/67670175412.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://seviboki.rf.gd/bewaniloforisapet.pdfIn PDF document text
    • http://sawopirorafo.rf.gd/vixibogepawesi.pdfIn PDF document text
    • http://ketanuviz.epizy.com/amor_de_verdade_letra.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_off0000b87a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB87A 4836 bytes
SHA-256: 6bbea35680c077e21c93b3d1313d17c03ff539727269ea8fe869c024ecb6d6c2
font_01_sfnt_off0000c8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FE 9972 bytes
SHA-256: 87fe0fa731b637e8174101be682963db9cd13caaa24efde5db079908f2f6b5ae