Malicious PDF — malware analysis report

Static analysis result for SHA-256 b41b47fc1adac6ad…

MALICIOUS

PDF

265.0 KB Created: 2021-02-22 11:01:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 8e008e352814a6dc253decd22aab3dc6 SHA-1: 09f1f8088a313cc38662f6de0491abbd6750694b SHA-256: b41b47fc1adac6adfc76e795c0adffad1a72a451a7e93231e38934fc2b93dae1
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a suspicious domain, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=weber+grill+chicago+thanksgiving+menu PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4462992/normal_5fcc0d1fab3d1.pdfIn PDF document text
    • https://kanazotevixif.weebly.com/uploads/1/3/2/7/132740718/306575ac.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445338/normal_5fe4c4f4aa4cf.pdfIn PDF document text
    • https://cdn.sqhk.co/dimumaneda/oCidgja/zijuma.pdfIn PDF document text
    • http://armlur.space/vuniwunabamajapawewokuwieatgn.pdfIn PDF document text
    • https://wekupadafar.weebly.com/uploads/1/3/5/3/135315244/rarunixoxije_vifavo_fokewetuzamobe.pdfIn PDF document text
    • http://lojasamericanasbr.com/netuwefesnleoq.pdfIn PDF document text
    • http://uanews.website/22894649971gxuvw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415304/normal_5ffa8025acb25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372354/normal_5fda3a685f83e.pdfIn PDF document text
    • http://winsl.space/catchmaster_glue_traps_reviewut6rx.pdfIn PDF document text
    • http://spindlndou.space/balls_bricks_breaker_mod_apknoo3l.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/bokelur/zitorabixisizal.pdfIn PDF document text
    • https://s3.amazonaws.com/lemerisinivum/ecommerce_template_html5_free.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/97616863254.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/sakipiwadu.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_off0003d57a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D57A 5488 bytes
SHA-256: 09ffa83046c898286b6ff94050b5acca7540eca185fb6af8a36aa04a3a28b384
font_01_sfnt_off0003e818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3E818 15180 bytes
SHA-256: 65ff04f28c7ba3ffed14843722e197511f1f1911c660e712ed3f4f451f3d8185