Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfcf5b9b01572511…

MALICIOUS

PDF

74.8 KB Created: 2020-11-10 21:26:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 04663573cc1f5a960e7c7a5b2949452d SHA-1: b9b2d9e71b1fa7e8635388890701d228987cf50d SHA-256: cfcf5b9b01572511132c7332ba901c77b0b9be4bc8bf621a143262461223595f
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/123?keyword=eso+selling+items+guild+traders In PDF document text
    • https://lifafogiter.weebly.com/uploads/1/3/4/3/134321186/tijedekukeluz.pdfIn PDF document text
    • https://kexoxuneve.weebly.com/uploads/1/3/4/5/134501441/fd4ac936d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404285/normal_5f933261a5909.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/lotokodaga.pdfIn PDF document text
    • https://pepisukuwen.weebly.com/uploads/1/3/1/6/131606293/ranerilin.pdfIn PDF document text
    • https://tikofasej.weebly.com/uploads/1/3/4/6/134615027/6444584.pdfIn PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/mexutizikuzol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f94255029a4e.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/febopa/analysis_of_financial_statements_of_a_company.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/75954562783.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/026fc12e-b1c0-4f7d-96f7-bb77972d9e02/nike_lifestyle_shoes_black.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/xebape.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78bc25cc-c6ab-4c42-b006-a9783c63af68/bavuzuzikifoko.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/mogikuvuwa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f3d2633-8de2-4b6b-bd35-4ec6aab18c7f/mes_mails_orange.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88E 5100 bytes
SHA-256: 25ef45ef21bc2f77e252783f34895864c7d08f5343dfc276f1425304b50a66fd
font_01_sfnt_off0000f9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9CA 10640 bytes
SHA-256: 0e6160b989fde9dc5ec1a97f5981bc765410a201f475694764ce323c928e5141

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