Malicious PDF — malware analysis report

Static analysis result for SHA-256 dab587b2af259759…

MALICIOUS

PDF

66.5 KB Created: 2020-11-28 15:27:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 4eb7d3ac3e023099cb40a47e20239063 SHA-1: 58ac750fe0e556ff5063bfb9308e428450029b35 SHA-256: dab587b2af259759dd9557294e4819b613480042f66d030e78fb3afda8993ad5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical detection for a link farm and a high ML score. It contains numerous external URIs, with the primary one being 'https://trafftec.ru/strik?utm_term=harlequin+desire+pdf'. The PDF's structure suggests it's designed to redirect users to a large number of other PDF documents, likely as part of a phishing or malware distribution scheme.

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://trafftec.ru/strik?utm_term=harlequin+desire+pdf PDF link annotation
    • https://lokixesope.weebly.com/uploads/1/3/1/6/131607163/sobomasado_negirerixate_genamitav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393208/normal_5f9581447cc05.pdfIn PDF document text
    • https://kojepogezoxuta.weebly.com/uploads/1/3/4/4/134487575/vafarolamep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_5fbf3dc7bbbc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379612/normal_5f8d3d318ede8.pdfIn PDF document text
    • https://loguxofe.weebly.com/uploads/1/3/0/7/130775118/lozasuwexekizis-wewozugegi-doriruruze-fagowawe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407729/normal_5fa3e50247e6b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387040/normal_5fb4ebfca9050.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/cc69aff7-bf69-41bf-8ae2-10a09b89bce6/45406639253.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5eddb006-bd89-41a6-8ec2-2f452f8923e7/girl_wash_your_face_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d168b2db-c3bd-4f11-94f3-42e2f0a15264/chevrolet_cruze_2012_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rujabepifar/research_article_example.pdfIn PDF document text
    • https://s3.amazonaws.com/lefemijip/reading_a_scale_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4194626c-5958-44b8-a42e-5d8d3bf25732/naruto_shippuden_capitulo_510_facebo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f44ede05-62bb-4dbe-a1ee-1399f96de9e7/diseo_y_distribucion_de_planta.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_off0000c662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC662 5124 bytes
SHA-256: af9082da005beb7b61c623848792814c7d15ab6851ad16248d6371aae7c2735e
font_01_sfnt_off0000d7d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D8 11176 bytes
SHA-256: a4a1d7eb2342624528d7678b9b6d7d032ddf3496f08403ee629ecb3a0375e1cc

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