Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6efc54109429907…

MALICIOUS

PDF

61.0 KB Created: 2020-12-18 19:43:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a5973ad7e47651d5b781f696d314ce02 SHA-1: 5902e9aaa502907eed4eb603d5ee4941275f01a4 SHA-256: d6efc541094299075877498d40e9188bccd3f1ce0a378cf6d10cacdb66b9e726
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with one prominent URL pointing to a suspicious domain ('traffnew.ru') that is likely used for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to manipulate search engine results or distribute malicious content. ClamAV also detected the file as 'Pdf.Phishing.Trojan'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffnew.ru/strik?utm_term=jesus+mi+fiel+amigo+acordes PDF link annotation
    • https://nikitepiwaligu.weebly.com/uploads/1/3/4/6/134647260/2938395.pdfIn PDF document text
    • https://fabuduviwanor.weebly.com/uploads/1/3/4/7/134739750/5569cbc6e01d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426073/normal_5f9af67e40b07.pdfIn PDF document text
    • https://zijunuriv.weebly.com/uploads/1/3/4/8/134892089/2170479.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/jixeremipet/47332868034.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34b919d0-7ee1-4751-b1aa-372b290bf16c/42862092981.pdfIn PDF document text
    • https://s3.amazonaws.com/novifamigot/wellcare_prescription_drug_plans_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/ruzunixokiti.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/46575507850.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/brazil_food_guide_english.pdfIn PDF document text
    • https://s3.amazonaws.com/pusori/alimentao_saudavel.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_off0000ada5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADA5 5328 bytes
SHA-256: 7dff6264cc9010348334000b70af5223adce31cd92b5bb171a656e868b2c96e2
font_01_sfnt_off0000bfaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFAA 12204 bytes
SHA-256: 9f23226a2f31a38ee454bacc21b155007cc6336cc69ad526d733acc4ce8e13d0