Malicious PDF — malware analysis report

Static analysis result for SHA-256 6619a94fd5ab1cac…

MALICIOUS

PDF

79.1 KB Created: 2021-03-03 18:46:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: ca0a1b389f71ab17635b43fdadccc033 SHA-1: 4775dc44d1be47506245fb20c8e9f70e98fcb7da SHA-256: 6619a94fd5ab1cac0fe9eecc9c07a0add6712afe8698cec3149e23db182fc532
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to Weebly and other hosting services, suggesting a link farm or phishing infrastructure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While the document body is heavily obfuscated, the presence of external URIs and the overall heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/strik?utm_term=how+to+use+a+master+forge+smoker PDF link annotation
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/1822462.pdfIn PDF document text
    • https://lukogazusewof.weebly.com/uploads/1/3/4/6/134643336/3712715.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/xezasefidilewezodoga.pdfIn PDF document text
    • https://gabofulonu.weebly.com/uploads/1/3/4/7/134730366/6513200.pdfIn PDF document text
    • https://zivexuxa.weebly.com/uploads/1/3/1/8/131871677/d68e1a53.pdfIn PDF document text
    • https://xesudubivutomu.weebly.com/uploads/1/3/5/3/135303490/sokutorokitex.pdfIn PDF document text
    • https://dirivabekere.weebly.com/uploads/1/3/3/9/133999762/sovadeguz.pdfIn PDF document text
    • https://jofufibiwew.weebly.com/uploads/1/3/5/3/135347649/4021426a6ff5d.pdfIn PDF document text
    • https://favapebunekef.weebly.com/uploads/1/3/0/8/130874429/kilesez.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://godubaxedija.rf.gd/timeline_gantt_chart_template_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/wizusazizeno.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/2005_jeep_grand_cherokee_4x4_problems.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/alfresco_community_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/quadratic_equation_worksheets_gcse.pdfIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/87120906107.pdfIn PDF document text
    • https://s3.amazonaws.com/nefunupu/financial_reporting_and_analysis_gibson.pdfIn PDF document text
    • http://zumewozuzetarun.epizy.com/punctuation_practice_test_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/purawuma/catfish_king_nutrition_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/19023677285.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_off0000f761.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF761 5172 bytes
SHA-256: 311e71ab082978dc7ddb495d234d368628b4695a283735829b9cf363ac3e9a2b
font_01_sfnt_off000108fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108FA 11216 bytes
SHA-256: fb0c4809f95261fe424f2dd2a717729383fae8f81afee19f09fcebd493212754

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