Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc70111134ce3ee6…

MALICIOUS

PDF

68.9 KB Created: 2020-12-21 09:21:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 818e29a60bd8e07da479a34f51c310bb SHA-1: 21e01b506c38aad672c742d72fe3071739815750 SHA-256: bc70111134ce3ee61c271878fd7734076aa583c49f83bd656c22eadda1fb3754
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffmen.ru/123?utm_term=cast+of+bad+blood In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0dd9b8ef7301f8b108504/t/5fc3f1343c6ccf69f3d878d3/1606676789878/rufoxan.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/amazon_web_services_documentation.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9e3bda9c57a97be47bf/t/5fc44c2df3de5e49b5ed5ee9/1606700077324/childrens_books_about_scarcity.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/vutibuxaposelujuwotibonu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd39d2109152533653190d/t/5fde04462da99c28680fe7fe/1608385607136/64342299761.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/rinebuwuwijokilini.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6518acd-4bb7-433b-8ffa-ea39ead46ebc/kexumepumamanubiguvajab.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/lesevarapokapenij.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/accelerated_learning_techniques_for_students.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdfcc9390302e2a48c50846/t/5fdff7d1fb7de13a647f707f/1608513490841/apc_back-_ups_xs_1500_service_manual.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2923b7848ba205d233c3f/t/5fd1d3a37c12252903f528a1/1607586724101/face_changer_2_for_pc.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf557ee18c5c478ef2e68f/1606374786353/quadratic_equation_parabola_examples.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d49a16f6d44b07be6b5d/t/5fc89951e21c7c679ae7e6f5/1606981975589/recorder_office_lake_county_ohio.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5c3e18e72e5fdbcf2875/1606376511149/uc_berkeley_engineering_requirements.pdfIn PDF document text
    • https://s3.amazonaws.com/sanekufiwumafo/olecranon_bursitis_exercises.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce00a12ee13227da658364/t/5fcfe6081604de68f572ec6b/1607460361448/migidimikuvaju.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_off0000d026.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD026 4848 bytes
SHA-256: 53256dfa02fc4755fc7376c82b3adf8c508a92a83b5e11ec9ed6c0e0e50cb129
font_01_sfnt_off0000e0af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AF 11228 bytes
SHA-256: 9b3b4886344b4f29054a027486b24f7ed5aa059cad1977e56d60e5e3c109ee95

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