Malicious PDF — malware analysis report

Static analysis result for SHA-256 448a833cf4b67af6…

MALICIOUS

PDF

72.5 KB Created: 2021-01-09 19:58:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 2b3de68239cf518084c96e496d658943 SHA-1: 9860675599c65b83221c2032e5ee722db3263dad SHA-256: 448a833cf4b67af697722ceebeefd79f70a532ff2c4d8893723e691bad56f000
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'traffnew.ru', which is likely used to deliver a malicious payload or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://traffnew.ru/123?utm_term=st+thomas+hs+dover+nh PDF link annotation
    • https://cdn.sqhk.co/mibajufaneja/W4NO9id/occupational_therapist_salary_houston_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/fadanade/miaZJl4/color_line_definition_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415770/normal_5f9bab1a2a364.pdfIn PDF document text
    • https://cdn.sqhk.co/seponidozit/jHpyidy/smart_belize_data_plans.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456420/normal_5fed916f38188.pdfIn PDF document text
    • https://cdn.sqhk.co/loxepafigav/1MRr7qH/survival_rate_of_lung_cancer.pdfIn PDF document text
    • https://cdn.sqhk.co/xezexasag/gg0jjXQ/ant_hill_garnet_earrings.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365536/normal_5fd38feb8af3b.pdfIn PDF document text
    • https://site-1168088.mozfiles.com/files/1168088/putagaki.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosenijosu/lziagem/24852800534.pdfIn PDF document text
    • https://aquinasathletics.orgIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xatojem/fusame.pdfIn PDF document text
    • https://s3.amazonaws.com/bulolimepol/poloxi.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/oil_filled_baseboard_heating.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/jemowuzoxotesolewojitebu.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/wound_assessment_tool_template.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_off0000deda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEDA 5196 bytes
SHA-256: ff58abeba0b3d052ea2fc17fb39883ba53700371b619d562788a798531784e6d
font_01_sfnt_off0000f054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF054 10648 bytes
SHA-256: b32f66b23081b29f30c06d4da4a9cf29c9820e750603bbd7ce87ee37303bc0f4

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