Malicious PDF — malware analysis report

Static analysis result for SHA-256 46768f1a63871e86…

MALICIOUS

PDF

65.7 KB Created: 2020-11-27 10:54:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c438535e801f51c7227e149cb63f2b76 SHA-1: 97cdffdc655ce3abc90fbc31714646c00b48ef8e SHA-256: 46768f1a63871e863f2e266e1972709ee2b1de40ba34dfa434bf7afb75de63e2
156 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffine.ru/123?utm_term=number+chart+1-200+blank PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5f8717442ccae.pdfIn PDF document text
    • https://mabufome.weebly.com/uploads/1/3/4/8/134880487/lusiguvelokuxa.pdfIn PDF document text
    • https://lovunekigip.weebly.com/uploads/1/3/4/6/134685916/fapivosu_dinoxibekagi_vatawaxiter.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/widofafane/69454639771.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f281f8f-5c52-413a-a7b5-9651a64b20e4/mefobulobatoxipapokawapi.pdfIn PDF document text
    • https://s3.amazonaws.com/vavabi/access_consciousness_level_1_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36767e06-ce74-4d8e-9940-5b1b7b2e8f9e/wegemagudodowefudobusirod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e2634d8a-9ceb-45b2-9891-72391ebbcbf2/student_test_analysis_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c618bf1e-0996-4b1b-a60d-accf042b725f/bdo_ps4_trading_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rotowan/year_planner_template_2016_free.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/diablo_2_save_file_location.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/wemumomelibukepokerikamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/240a4854-a359-413f-a355-a4aaba507a2c/advanced_crafting_dragon_age_inquisition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d98ea6e-dd2e-4ea3-9517-7834a08c7412/xekakagazojobo.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_off0000c4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E8 5392 bytes
SHA-256: f7df41ea2a0285cca3cc92fa20b19d90c73dae33ad7c0e38f557edbe60db2796
font_01_sfnt_off0000d726.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD726 10588 bytes
SHA-256: 461ba9caca2dafca0ef60269cf9acbf55d880bbdbd8f7a9e6212a5fca38d7eff

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