Malicious PDF — malware analysis report

Static analysis result for SHA-256 f77f10ba81765801…

MALICIOUS

PDF

64.1 KB Created: 2021-02-17 13:44:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: dea85705d8fbbfe6a3ae71548374d5fe SHA-1: b47f2bd7569b2202f7a7208a8405e6e209f6751f SHA-256: f77f10ba81765801d664510742a94224a2804dd956490bf506141f46557ac2f0
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://baarspo.ru/wix?keyword=cardinal+directions+worksheet+5th+grade PDF link annotation
    • https://cdn.sqhk.co/vunalogivefu/PRYhagh/donde_recarga_amigo_entretenimiento.pdfIn PDF document text
    • https://widetidutu.weebly.com/uploads/1/3/1/4/131453832/4191517.pdfIn PDF document text
    • https://dunebuka.weebly.com/uploads/1/3/2/6/132682868/naxixofipu.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/zemufaf_balanagibarutag_jitomatutudusa_nadekabireva.pdfIn PDF document text
    • http://palejep.22web.org/jazeguf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417656/normal_5feb9a55cb281.pdfIn PDF document text
    • https://xeruterone.weebly.com/uploads/1/3/2/6/132680908/3aa2bec4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_5fd341bf34bda.pdfIn PDF document text
    • https://lapaluletegole.weebly.com/uploads/1/3/4/6/134679291/544406.pdfIn PDF document text
    • https://bijariruxo.weebly.com/uploads/1/3/1/3/131382387/kobukug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452865/normal_6010cb8ad2c9e.pdfIn PDF document text
    • https://zorisurirumu.weebly.com/uploads/1/3/4/6/134600588/9964027.pdfIn PDF document text
    • https://cdn.sqhk.co/wemonamo/ddRmqji/fuliwamoto.pdfIn PDF document text
    • https://wosuletoxo.weebly.com/uploads/1/3/0/7/130739711/bexizuzigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lujifub.epizy.com/pezixizomumu.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_off0000beb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB1 5388 bytes
SHA-256: 3523635f692b4f27db918aef19a0154979e48474cbd379a5ebab506ffbe99b83
font_01_sfnt_off0000d10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD10A 9912 bytes
SHA-256: 0cd24aa0674032710f55310c1898e2adc27498303d1d7f4ef0322cd72e3521ea