Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a945ba7a3f5d29e…

MALICIOUS

PDF

44.0 KB Created: 2020-11-06 23:02:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-11
MD5: c048236c0f80a15473877a9d4052d4fe SHA-1: dbe53e7e9414ea7b99342975bea51f4a4f79a28c SHA-256: 3a945ba7a3f5d29ef11944b5161d17e04b02ffc07f851b02cf15ccf014447272
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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://traffset.ru/123?keyword=marilyn+monroe+my+story+my+life+book PDF link annotation
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/211e017a.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/fefavuvepime.pdfIn PDF document text
    • https://ridolagu.weebly.com/uploads/1/3/0/7/130775195/e09811dcb321b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://lusiwelop.files.wordpress.com/2020/11/vajurupakimeluweb.pdfIn PDF document text
    • https://fefitaw.files.wordpress.com/2020/11/64939725781.pdfIn PDF document text
    • https://podenujo.files.wordpress.com/2020/11/potokudowajipube.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a8e170e-5f4a-4a48-8395-5f5eef1d746b/39786871269.pdfIn PDF document text
    • https://xeruluzolu.files.wordpress.com/2020/11/gunanegezitujugalevodero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a246357a-59b1-4b67-a856-afd61044f9a4/bejutenajepepigubetabab.pdfIn PDF document text
    • https://kolinaxud.files.wordpress.com/2020/11/94126927529.pdfIn PDF document text
    • https://zogidadovo.files.wordpress.com/2020/11/gepixizorekabonagasi.pdfIn PDF document text
    • https://gizaxem.files.wordpress.com/2020/11/frizzy_meaning_in_tamil.pdfIn PDF document text
    • https://guxedozepi.files.wordpress.com/2020/11/onkyo_ht_r380.pdfIn PDF document text
    • https://disabuwipe.files.wordpress.com/2020/11/kipimomunumoku.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_off00006a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A66 5224 bytes
SHA-256: 8354de0938c3f3de684ffaceb34b430ba9259027a7f33de92384e162be7fe11e
font_01_sfnt_off00007c2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C2E 10740 bytes
SHA-256: 7217b1b61998581c5f84a2ac75bc89a44b71711c0f056ceb46f1b940fb42ddc0

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