Malicious PDF — malware analysis report

Static analysis result for SHA-256 420fab97b5ec2548…

MALICIOUS

PDF

71.8 KB Created: 2021-02-08 11:35:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2de85ad689d32e2c25e971fcc08d1940 SHA-1: e76236ab21213202bd66378fcd861cc9face08f2 SHA-256: 420fab97b5ec2548870b7a92842cfcc1d96040f74b6947b7e0c7b8d2fa414b5d
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or a lure for malicious content. ClamAV and ML classifiers also flagged the file as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs indicates a potential for downloading further payloads or redirecting users to phishing sites.

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://druttle.ru/123?utm_term=manual+jack+plates+for+outboard+motors PDF link annotation
    • https://nefatalij.weebly.com/uploads/1/3/2/7/132740339/dototaziwutadonu.pdfIn PDF document text
    • http://tezatigobupuvu.22web.org/3d_blueprints_for_minecraft_pro_apk.pdfIn PDF document text
    • http://doworevo.22web.org/xinekupozep.pdfIn PDF document text
    • http://dadosib.22web.org/scarecrow_face_templates.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/ciajf4E/vodazodopumeroxowuwi.pdfIn PDF document text
    • https://cdn.sqhk.co/gatidixon/eqfjcge/classic_cars_auction.pdfIn PDF document text
    • http://tilodog.iblogger.org/ar_rahman_hits_songs.pdfIn PDF document text
    • https://muvekova.weebly.com/uploads/1/3/5/3/135394778/b2324d8b7e34c.pdfIn PDF document text
    • https://cdn.sqhk.co/kufedefivuvu/cywjcB1/ncert_book_solution_class_9_download.pdfIn PDF document text
    • http://idealslimitalia-ufficiale.site/valoracion_de_las_14_necesidades_de_virginia_hendersonlzg37.pdfIn PDF document text
    • https://lerinaxupol.weebly.com/uploads/1/3/4/6/134662503/3445525.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/bokofapig/8364120549.pdfIn PDF document text
    • http://pafovipazatuk.rf.gd/tuwezu.pdfIn PDF document text
    • https://s3.amazonaws.com/veraxawewib/17536711348.pdfIn PDF document text
    • https://s3.amazonaws.com/faxaxos/sasawerib.pdfIn PDF document text
    • https://s3.amazonaws.com/batoragubukepo/tibubarukisobevuvisa.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/prudential_center_seating_guide.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_off0000d881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD881 5588 bytes
SHA-256: b803fbba56b12cc36f4415fca9b5dd5f47e044d9f8a340c371b6dc021c0c7610
font_01_sfnt_off0000eb7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7C 11324 bytes
SHA-256: 410a1b890b2f77a584db1b645094882325a2e27d375b01c34bf9583e0085c3c6

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