Malicious PDF — malware analysis report

Static analysis result for SHA-256 63f63d19e3b1e8ac…

MALICIOUS

PDF

76.1 KB Created: 2021-05-25 11:57:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d05930269df81cf8832f75b16a3dd7c1 SHA-1: 19a3365f8dced7b02c14b332c98cc28392138cc2 SHA-256: 63f63d19e3b1e8ac245c2190033433b81682e5ca0b413f1ba68e7204b2a4eb11
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URI heuristics point to the use of JavaScript for link manipulation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/strik?utm_term=yale+mpb040e+%2528b827%2529+forklift+repair+manual PDF link annotation
    • https://zunepijubu.weebly.com/uploads/1/3/3/9/133986973/c64f26.pdfIn PDF document text
    • https://pefikasulanak.weebly.com/uploads/1/3/4/3/134350375/2587246.pdfIn PDF document text
    • https://xuzelakojit.weebly.com/uploads/1/3/4/5/134593048/1a54359ba0e854.pdfIn PDF document text
    • https://makifilibavik.weebly.com/uploads/1/3/5/3/135383918/dovifapezogavalu.pdfIn PDF document text
    • https://zozilevijuni.weebly.com/uploads/1/3/1/3/131383476/jazelemil-fadazabixa.pdfIn PDF document text
    • https://tobejisexin.weebly.com/uploads/1/3/1/4/131454505/xabukojizew.pdfIn PDF document text
    • https://rufamuvobaj.weebly.com/uploads/1/3/4/7/134720601/f3faa6faa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390324/normal_603892c26fb08.pdfIn PDF document text
    • https://tixuxawopor.weebly.com/uploads/1/3/0/7/130738504/tosofas_jumevalibi.pdfIn PDF document text
    • https://jafedojinow.weebly.com/uploads/1/3/0/9/130969492/dadozosefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402280/normal_6031ca010994a.pdfIn PDF document text
    • https://mebodamuruwij.weebly.com/uploads/1/3/5/4/135400263/3607023.pdfIn PDF document text
    • https://tigasuzile.weebly.com/uploads/1/3/1/3/131379741/309e5.pdfIn PDF document text
    • https://wutupebepa.weebly.com/uploads/1/3/3/9/133997315/63111.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee90c77e-9a33-45c0-82c9-e8120725ba56/tekegumolawoxelo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c69f1dd2-5b0e-4e0e-b44a-3312508f492e/9822659672.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec1c9911-9559-4d27-b703-4dc10532198a/kuwokodililov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1fe08ed-f9b6-4c3e-bbd1-580728467178/3162919635.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/adc15f49-47a9-4f1c-9b13-67afe9d1f462/83999843606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b679f31f-c4bf-4858-882c-bb71e77ad9f8/100_verbos_mas_usados_en_ingles_presente_pasado_y_participio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9739f9eb-0f1d-459b-8538-65c8cab4e9aa/xiwumisiwumiragitepomuwum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c6fbea-b565-4247-bec2-d6169bc85207/54746531190.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d494f60-8d11-4da6-b409-2a002c45d0c1/kixepupolekuvanirufenaxe.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_off0000ece0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECE0 5824 bytes
SHA-256: 7eb31ef41b82548900b73cd85524126b2849191f8781e364fcd2aadae7df0d49
font_01_sfnt_off000100ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BA 10060 bytes
SHA-256: e953a7f95c8c4eb93a556315d9e7618864f0317704e543bc53bf87f5fb5bc2ce