Malicious PDF — malware analysis report

Static analysis result for SHA-256 9056b7bd770afd3d…

MALICIOUS

PDF

75.9 KB Created: 2021-03-21 08:14:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: a446f8a347c07db428f94f16243e800b SHA-1: d58530ed7d23c0e8d97c18cd987448f7cc08246b SHA-256: 9056b7bd770afd3d9fdb235c59bb1a9fde55ee10e665114fd2878fe83a880b6f
134 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 URIs and is classified as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the presence of embedded URIs points to a potential download or redirection mechanism.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pelibifir.ru/wix?keyword=john+wick+3+full+movie+free+download+reddit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462985/normal_602194caacb0e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387242/normal_5ffb812ac6558.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378606/normal_6021c5d13bf0c.pdfIn PDF document text
    • http://bixaxivajujojar.mypressonline.com/bovenadereriwomejimox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445331/normal_600a82d42e05f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417309/normal_5ff8072400cf7.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/2c4bf2e4-9b63-42d8-a37a-fcee7ef7b274/grammar_practice_workbook_grade_6.pdfIn PDF document text
    • https://52a72965-a6d2-471e-b66a-59a59a4d663b.filesusr.com/ugd/e643da_12dd3845c0df4523890fa8e8c38dcc8a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sixolose/zasiwutijosanad.pdfIn PDF document text
    • https://c751e6e8-0850-424d-b14e-d7ae46260796.filesusr.com/ugd/bc1028_2d7e624b23f840f88d366e51811dc060.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/neporezofov/kindle_ebook_formatting_services.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad89ea1f-19b5-4414-81d2-0a3b2feb28d3/the_road_not_taken_summary_in_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc9f85f2-d59c-44c9-950e-6c80f670d06c/zakogudovivebajazi.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/jimeletudim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7de9017b-889e-4e0a-bd26-ea5c6a7fa802/journey_to_the_center_of_the_earth_3d_filmyzilla.pdfIn PDF document text
    • http://zoligagomuwe.onlinewebshop.net/76218611990.pdfIn PDF document text
    • https://e1ca4115-fb55-43f9-84f1-eaf814f8c83f.filesusr.com/ugd/18122d_06c7d3ca4d1a473d9e16b231d36fb465.pdf?index=trueIn 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_off0000ea70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA70 5452 bytes
SHA-256: 557603c28b8bdced8b22400a04a99d7b62e05e41c093228ad400d4f7559f94bf
font_01_sfnt_off0000fcf0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCF0 10984 bytes
SHA-256: 2acce8f5ad156ba92c8f6a3c32430bd9b66a77c32c1143f49f921c2c00532e0f

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