Malicious PDF — malware analysis report

Static analysis result for SHA-256 74ec9cef74564f04…

MALICIOUS

PDF

63.3 KB Created: 2020-11-30 23:40:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 961b7198a7f62317d75ce983e2b5ae5a SHA-1: 9b2dd9ad19d64830fe1d70e17b691507dd2735af SHA-256: 74ec9cef74564f046c6d39b20921862e9ef07cc9111fbcdb456e575a1be8535f
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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafftec.ru/strik?utm_term=purdy%2527s+candy+apple PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4427093/normal_5fa5775bc3e4d.pdfIn PDF document text
    • https://jutebipofan.weebly.com/uploads/1/3/4/3/134334370/kitawonosuzarow_bepadasimevuja_sebuledidad_nolinesazukem.pdfIn PDF document text
    • https://kageketiwef.weebly.com/uploads/1/3/4/5/134581137/34069a6d7c6.pdfIn PDF document text
    • https://safusubugem.weebly.com/uploads/1/3/4/6/134609944/1895940.pdfIn 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/5fc0e940bd14ff0dd29cb4d3/t/5fc18d12eaf37e3b64d71a04/1606520082967/how_to_center_text_in_photoshop_cs6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51f55975-dfce-4c29-baf5-15bc575bf897/zomovebaxitadilazatasen.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd287d3e297f74585cba1d/1606232193870/marta_rail_line_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85445b2b-9cb8-4085-95f4-12a0fdca0f45/rooting_kindle_fire.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2d3d6a2-3a60-485b-a5be-1f6c6ccc17a5/plain_style_a_guide_to_written_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4043b48f-1f2d-485a-aea9-b0b0ec981806/nelazulevena.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe26173570fb44d1cc7600/1606297112333/37834067940.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_off0000bd01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD01 5204 bytes
SHA-256: 5a924eee4e4564e03a8abf649a93b640ba83a6dcd3dfd8c2954f849ef12c85a6
font_01_sfnt_off0000ced3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCED3 9832 bytes
SHA-256: a65a5bf847cfda3e536f45cc6671ebc52445ae92b09a6578a6a16e7be1f44905

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