Malicious PDF — malware analysis report

Static analysis result for SHA-256 3948562fefd026fb…

MALICIOUS

PDF

71.9 KB Created: 2021-03-07 03:57:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 2b30873405ef1b0e9deff8a6b90da16a SHA-1: 34288401e37883264be6b0320c971063a4583019 SHA-256: 3948562fefd026fb77959fe8ab08b32ff00f5b22a4c23be9b8139348b07f5314
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of embedded URLs, specifically 'https://golowaki.ru/strik?utm_term=weber+grill+chicago+steak+seasoning', suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are sufficient to infer a malicious attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://golowaki.ru/strik?utm_term=weber+grill+chicago+steak+seasoning PDF link annotation
    • https://cdn.sqhk.co/nisugavu/thjopa0/45484155438.pdfIn PDF document text
    • https://cdn.sqhk.co/parabeset/gfojg9T/at_home_nail_techs_near_me.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370294/normal_60257d810c991.pdfIn PDF document text
    • https://cdn.sqhk.co/pememobuwir/ge4ZAia/97563610140.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382209/normal_5ffcb252ef539.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465133/normal_5fc73799e609b.pdfIn PDF document text
    • https://cdn.sqhk.co/wotezowedo/kujfzif/zowesu.pdfIn PDF document text
    • https://cdn.sqhk.co/sofetarunox/hgQqXbd/zetajuna.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/furunumaroxun/25807898918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d730be12-cd9d-4d9d-9f7f-4e7e3bf259f0/what_foods_can_you_eat_on_the_10_day_advocare_cleanse.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/39077102470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530c78fb-9cca-4e24-a95f-8b0d60a4f8b9/jiwifamevep.pdfIn PDF document text
    • http://pabovabavuwemet.rf.gd/58764638438.pdfIn PDF document text
    • http://vuvezivitajiros.rf.gd/netflix_codigo_tvq-rnd-100.pdfIn PDF document text
    • https://s3.amazonaws.com/jipowumat/guidestone_life_insurance.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/37446267710.pdfIn PDF document text
    • http://kipafiperugava.epizy.com/commerce_department_durable_goods_report.pdfIn PDF document text
    • http://dopisudul.epizy.com/aatma_movie_mp4.pdfIn PDF document text
    • https://s3.amazonaws.com/dafumuxitupav/10721903233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/46da305a-8d49-4575-9820-c68c96a969fc/nivilowinalisevejonulaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03f157f2-c3f8-4a87-8707-9f124107dd9d/how_long_does_a_dyson_dc44_battery_last.pdfIn PDF document text
    • http://lutolajawaw.rf.gd/9252839762.pdfIn PDF document text
    • https://s3.amazonaws.com/xasovewipeje/37461136913.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_off0000dbb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB3 5276 bytes
SHA-256: d16d3ded44d116538a10aa47973c534468aae8ccd97840f2e13e9b6e0d6e323b
font_01_sfnt_off0000edb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB4 10632 bytes
SHA-256: 54c90861de436a9f07769c5895a666b19ffa7b356595357870842f472760f88d

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