Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6e9f5b755bd8c0…

MALICIOUS

PDF

67.5 KB Created: 2020-12-01 02:53:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d69260f16f28fcb1b9646d87781cedd0 SHA-1: 95a4f550149c0997f36cfd1d2c11d1021f39a8c0 SHA-256: 0f6e9f5b755bd8c0a4880975f2f50dda212830a2ba031964969e23eb173b8670
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/strik?utm_term=quilt+design+software+for+ipad PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386335/normal_5f9ab6dad7504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449992/normal_5fa1eac7c36ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386837/normal_5fa8cfc693872.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407733/normal_5f985fdf599c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371495/normal_5f9c4d8b70b0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501037/normal_5fb39b2517473.pdfIn PDF document text
    • https://dibodowe.weebly.com/uploads/1/3/4/6/134686502/6c7b2c4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5fab89932ce0e.pdfIn PDF document text
    • https://voloripilobolim.weebly.com/uploads/1/3/4/6/134635915/7496818.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373297/normal_5f9b382c86a9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376621/normal_5fadcf62de087.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/zuwosil/multiplying_binomials_foil_method_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034b5581-f354-4297-8d6c-405aafb2f67a/purchase_manager_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/80720749412.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA95 5360 bytes
SHA-256: 4afba536a229a240c1490cd195ccb649c90d8bb892844297a3b23610668159f5
font_01_sfnt_off0000dcf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF5 10648 bytes
SHA-256: 03453f1d25f15072386b9678f1589bc5fc6d59489fc577c9979fae0d4fef48ce

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