Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4d8881da9c5a090…

MALICIOUS

PDF

71.7 KB Created: 2021-02-14 11:54:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 92225e51a76f43bc64c27e9123dea2aa SHA-1: 85f47b19b23b875d814fdad7b0a274bc4e047924 SHA-256: e4d8881da9c5a09003b368c54b3be6dae5e194ae5b4cd321a5d7914074262f04
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/aws?utm_term=free+writing+paper+template+for+second+grade PDF link annotation
    • https://dakewamegiru.weebly.com/uploads/1/3/5/3/135305658/dugaxinitulox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486566/normal_5fe33ee79ac73.pdfIn PDF document text
    • https://cdn.sqhk.co/gizivapejoko/phcdBjc/20065722108.pdfIn PDF document text
    • https://kasababafaraw.weebly.com/uploads/1/3/5/3/135336348/ridokotijejirujovi.pdfIn PDF document text
    • https://cdn.sqhk.co/temisexezoda/tjjKMyy/high_speed_car_crash_games.pdfIn PDF document text
    • https://cdn.sqhk.co/rowalulo/cehikgd/20127909141.pdfIn PDF document text
    • https://nefosedinipal.weebly.com/uploads/1/3/4/6/134698739/liwaremisum-titukimovidef-dovejonid-gozolitakuj.pdfIn PDF document text
    • https://wesatelifap.weebly.com/uploads/1/3/1/8/131871597/7973962.pdfIn PDF document text
    • https://cdn.sqhk.co/vefoveted/jQwjghf/gegozuvumijol.pdfIn PDF document text
    • https://numokafi.weebly.com/uploads/1/3/2/6/132695525/lanujobukumu.pdfIn PDF document text
    • https://gumakamatiz.weebly.com/uploads/1/3/4/6/134600955/nemudomazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/zoxulugesesajufexomazema.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/30476081736.pdfIn PDF document text
    • http://medomapex.epizy.com/65228849555.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/bacteriology_of_water_milk_and_air.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_off0000dcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC4 5520 bytes
SHA-256: a5ac4dc44b9b50517bc02237ceeeffc6df12c458ecf6e562380a79eed11b647f
font_01_sfnt_off0000ef8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF8D 9928 bytes
SHA-256: 8cd375444ae6638850dfbadd9d67c6f5f47b6fcaefe3bddf744bb25fcab03f28