Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e01b4b6eeab80b…

MALICIOUS

PDF

67.4 KB Created: 2021-02-19 08:37:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 503b9e2150495ba514c05429627c628c SHA-1: a16ecf0bdcf75b9f7e156384d93d178c6d540f4a SHA-256: b1e01b4b6eeab80bde3c750c66bb032ec0c5da9439e06652edab4f2efb348075
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jacksth.ru/wix?keyword=joining+the+conversation+a+guide+for+writers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421050/normal_602bb1b664acc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447436/normal_602963d66b53e.pdfIn PDF document text
    • https://finuvowevemez.weebly.com/uploads/1/3/5/3/135397693/56711.pdfIn PDF document text
    • https://lurufabufukigo.weebly.com/uploads/1/3/1/4/131407807/bunirexa.pdfIn PDF document text
    • https://nukubutanedun.weebly.com/uploads/1/3/5/3/135309192/6708672.pdfIn PDF document text
    • https://xoxekoxezugox.weebly.com/uploads/1/3/0/7/130738790/woginuwirozuxat.pdfIn PDF document text
    • https://lefaxujil.weebly.com/uploads/1/3/0/7/130739779/4172386.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzalolotagi/b8AkieL/fexaxawafewisexix.pdfIn PDF document text
    • https://cdn.sqhk.co/pamezuravuno/gjMVjck/81434294387.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5ff5f925dd8b0.pdfIn PDF document text
    • https://sonunupenoxomo.weebly.com/uploads/1/3/3/9/133986361/fupilisutik-danovomovexere-kasaduwaxeradar-palojuxu.pdfIn PDF document text
    • https://fepobiwebefu.weebly.com/uploads/1/3/4/5/134592484/9955909.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_off0000caa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAA1 5524 bytes
SHA-256: ab43d689d806b424b9f26f240b00d369cfe5b0e23173a3eff5f40552d044a498
font_01_sfnt_off0000dd84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD84 10276 bytes
SHA-256: 049c8bdfb900a952c05ba9646b80ade59b4f51697aa12c6bd6a6d48e14b075ea