Malicious PDF — malware analysis report

Static analysis result for SHA-256 0df1ee134b629e1b…

MALICIOUS

PDF

71.2 KB Created: 2021-03-01 09:24:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 28816615c977fdb59aef34c5f4bb126a SHA-1: efc3c21519f702fb38fbdcdfc0a91ad1ad8336d6 SHA-256: 0df1ee134b629e1b551993bb23d9651e2fb3687d7a5ae12ac0694df1a67fb061
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://botokaw.ru/award?keyword=what+is+the+purpose+of+an+assembly+drawing PDF link annotation
    • https://gosinixubog.weebly.com/uploads/1/3/4/8/134875818/5563e830a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500444/normal_5fdbfc0c5640e.pdfIn PDF document text
    • https://perasukene.weebly.com/uploads/1/3/4/6/134644841/fufoluwavozikiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5fea19544afbf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480591/normal_5fde073da20fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405652/normal_5fffea1a5f645.pdfIn PDF document text
    • http://xapufogoximemin.22web.org/86314533987.pdfIn PDF document text
    • https://ramageputa.weebly.com/uploads/1/3/1/6/131637054/dadolazijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403533/normal_6022a5b4a8c29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370056/normal_60258178cd8ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487409/normal_602f15a8e9106.pdfIn PDF document text
    • https://tazanuna.weebly.com/uploads/1/3/5/9/135977230/tifenegokedufex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415544/normal_5fdf0f24ce42d.pdfIn PDF document text
    • https://talokawibameze.weebly.com/uploads/1/3/4/0/134000376/48bc7ab6a4b51c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377403/normal_5fc5db0931839.pdfIn PDF document text
    • https://mifadumuvuvog.weebly.com/uploads/1/3/4/6/134689338/7556820.pdfIn PDF document text
    • https://jinikegubu.weebly.com/uploads/1/3/4/8/134873825/xoxaf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vudafudilisa.epizy.com/33622779446.pdfIn PDF document text
    • http://nazifaba.rf.gd/belzebubs_blackened_call.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_off0000d83b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD83B 5800 bytes
SHA-256: 7b6c81809eb756e1e15572fb7c0116e942a678652da647fcb249387a8d7be665
font_01_sfnt_off0000ebee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBEE 10328 bytes
SHA-256: 4c8f2d2c1af65d009f0759539760942e2bba537ceadb874d6e8ead68ace22090

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