Malicious PDF — malware analysis report

Static analysis result for SHA-256 2039568af1b63e0b…

MALICIOUS

PDF

83.0 KB Created: 2021-03-18 07:20:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5d179e07c97d95dbe8868d1f08e0b1f6 SHA-1: 85c2b83e894a44190ff572dc11b653ca153d5a22 SHA-256: 2039568af1b63e0bf2a905b6edf4d1d846aaf5fc2422cf6dc7761bdc651a5f7a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous external links, with a critical heuristic identifying it as a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically phishing. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful websites.

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
  • 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.
  • 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://seumenha.ru/strik?utm_term=scarlett+18i20+1st+gen+vs+2nd+gen PDF link annotation
    • https://cdn.sqhk.co/wodaximewule/ggrUHgf/2964398196.pdfIn PDF document text
    • https://cdn.sqhk.co/zozevuxe/ghNhezP/chatrapathi_songs_free_com.pdfIn PDF document text
    • https://cdn.sqhk.co/lewulula/aT0ichb/nekala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422890/normal_601d7a137c4bb.pdfIn PDF document text
    • http://noxogejukebe.mypressonline.com/cambridge_igcse_business_studies_coursebook_answers.pdfIn PDF document text
    • http://ginixotojaru.medianewsonline.com/31624341059.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379476/normal_6031139d944d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454277/normal_5ffcb3a566c9d.pdfIn PDF document text
    • https://cdn.sqhk.co/rapawaferew/cNhfZib/dialectic_of_enlightenment.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://56db2a4d-09ce-4ff6-a558-abb1d6727cd4.filesusr.com/ugd/003b86_56b72dd997b24253a0e1097ee36c534c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nagev/averta_extra_bold_free.pdfIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/85196659014.pdfIn PDF document text
    • https://s3.amazonaws.com/serogajugomiji/taxutezulerof.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/menstrual_migraine_treatment_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/remeranexe/gelita_gelatine_sheets_gold.pdfIn PDF document text
    • https://s3.amazonaws.com/rumezo/how_much_is_a_2020_toyota_camry_xse.pdfIn PDF document text
    • https://983c8978-ad56-435f-a988-47358aa6040c.filesusr.com/ugd/06a663_480949bbed6c407180789ea8815e6827.pdf?index=trueIn PDF document text
    • http://lojabupabavize.onlinewebshop.net/taboxamumupitedebawita.pdfIn PDF document text
    • https://s3.amazonaws.com/zifilobesumafi/cisco_ise_vmware_installation_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zesixefe/captain_twin_platform_bed_with_storage.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_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 5792 bytes
SHA-256: 9df399e9485675359f14ce54abf552b071307c6653cb2365a99d0c6cc08e18ba
font_01_sfnt_off00011824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11824 10872 bytes
SHA-256: 3a3d662e13c60ccb707b07fe55efa44665c0bbd52f05137f23677b8b4282c11f

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