Malicious PDF — malware analysis report

Static analysis result for SHA-256 67cc23efd8bd4e21…

MALICIOUS

PDF

72.5 KB Created: 2020-12-05 18:43:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 16e8fd5725bda00589b244e8d9338e16 SHA-1: d75011717cf2beeb78f1d2bd0e46b6ad9b5dea7c SHA-256: 67cc23efd8bd4e217bf64d220d0e729910d4a8be2992717a4baf87f84b96b123
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'trafftec.ru', which is likely a malicious domain used to host a phishing page or distribute further malware. The document body is heavily obfuscated and contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDF documents from web content, which could be leveraged to disguise malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=cara+vlookup+excel+2010+beda+sheet PDF link annotation
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc580f7084698658e7d73f3/t/5fc90cdccf3c217e5eac9ed9/1607011548729/srs_light_in_car_means.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/heart_broken_punjabi_song_ringtone.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1b05e92c50b1a1e7d1142/t/5fc5d390fa04221c71ea3dd1/1606800273534/rough_country_rustic_furniture_phone_number.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd15cc6cddda09e8509164/1606227405582/wedipewetabuzofuganosefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d96e55-a9d2-4d41-8430-585ae77ad0a8/gta_texture_packs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/699d43a9-41f5-41c7-9ff6-023292a5a958/el_mar_caribe_in_english.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/fsa_algebra_1_practice_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe3b3697-2e9a-4e5f-bb9c-d6a9914da4ed/el_zar_y_la_camisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5998ee12-c3cc-4570-9cad-d72d8a3f6488/letevoforezebetitimiw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfab18cb11b25c09bd43f/1606220466138/75056086271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc518e44-9fba-4caa-aba5-414203f969d4/japanese_skincare_revolution.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_off0000db1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB1B 5724 bytes
SHA-256: 7fa6b4ee9d076ef038856482efd4460235f2b93341eacfbd49a910731a1d6b39
font_01_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 11376 bytes
SHA-256: 39ae5487247a9fda20474584a239ec1bfa3e8b8dd01425e5ac02e3c033bbbe44

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