Malicious PDF — malware analysis report

Static analysis result for SHA-256 a543b632642bb390…

MALICIOUS

PDF

75.5 KB Created: 2020-12-15 14:31:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 4a80a9c03aa6641f4ceed3369d76b9f3 SHA-1: ba069c197b79f20189b8baf5261655dbe17f8e3c SHA-256: a543b632642bb3904153bc3f3d2b0d58854c589340fe90b5e86be2afed381bc6
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URL pointing to 'trafftec.ru', which is likely part of a phishing or malware distribution scheme. The document body and metadata contain references to this URL, suggesting an attempt to trick the user into visiting it.

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://trafftec.ru/strik?utm_term=nechryael+slayer+tower+guide+osrs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486537/normal_5fd31a6d13573.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467286/normal_5fa590083bcea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5fd6709c31ef8.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/jarirotexab/netbeans_jdk_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/starting_a_radio_station.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/wemaxepusajovaded.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files2/21023019007.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/identifying_figurative_language_worksheet_7.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/66508000110.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6e7e4a3ccef3526e80d26/t/5fcf253cfaf0bc04d1c5fc81/1607411005570/wood_joints_for_tables.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc544960b6b03258f52273b/t/5fc922b811c7f938249c3493/1607017145014/80s_rock_songs_about_love.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD217 6552 bytes
SHA-256: 0f831c6e60b998fe8b902b8ac0e46c8e4f38f6283482003de1894cf70764c4aa
font_01_sfnt_off0000e895.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE895 5364 bytes
SHA-256: 8f8bd60597da47db25cb2d226ca53eeaec69eb4f23373fff5bc0e66373c44ae0
font_02_sfnt_off0000fae8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE8 11332 bytes
SHA-256: a761daf5d13d738fa873b0b96eca73e92486c757c27571218d4adf9dffefc08d