Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9889d35c3a825ee…

MALICIOUS

PDF

76.3 KB Created: 2021-01-15 15:01:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: a5bf84f578bad9365c8dd1c84b57173c SHA-1: 27258047a637d0c153adcff7b4042dec163e1c90 SHA-256: b9889d35c3a825ee6941d9bd3db6cd44cabdd9b0edb1b2d460a819e98af831f1
96 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ML classifiers and ClamAV. It contains an embedded URI pointing to 'trafftec.ru', which is a strong indicator of a phishing or malware distribution attempt. The PDF structure and embedded content suggest it's designed to trick users into visiting this external link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafftec.ru/aws?utm_term=custom+bottom+sheet+react+native PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388412/normal_5fc5de823f06d.pdfIn PDF document text
    • https://site-1167971.mozfiles.com/files/1167971/pdf_file_failed_network_error.pdfIn PDF document text
    • https://site-1174542.mozfiles.com/files/1174542/missile_command_portal_2.pdfIn PDF document text
    • https://site-1176591.mozfiles.com/files/1176591/fruit_candy_blast_game_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377905/normal_5fdc23ce49068.pdfIn PDF document text
    • https://site-1177224.mozfiles.com/files/1177224/minecraft_epic_nova_skins.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/Vtw9YaB/94216742965.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/ronatiduzoxij/penguin_readers_level_4.pdfIn PDF document text
    • https://s3.amazonaws.com/miwolezedubujoz/kohler_engine_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxalirudidel/brinell_hardness_conversion_chart.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/50935932369.pdfIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/dispute_collection_account_credit_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/us_visa_photo_guidelines.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_off0000eaca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACA 5112 bytes
SHA-256: e34cc4c8caad3b3e6bb2d45b033655d48069e36000bfdb59df3dba8ca6f104e6
font_01_sfnt_off0000fc00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC00 12108 bytes
SHA-256: 3365fc4ef51488599bbc0e25caf1fb236ec72a1f62ee6e849db39a26425515a9