Malicious PDF — malware analysis report

Static analysis result for SHA-256 4eed26d35a829c69…

MALICIOUS

PDF

67.8 KB Created: 2020-12-17 22:36:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 64525e2a41f70e067053bbe9b921e89e SHA-1: 121c65a7ce61742c15d3e02fe30a71e0aa49c269 SHA-256: 4eed26d35a829c69e44a795492ccf8982c332d391f1d2f6e577fbc210924458a
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 0.9997

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://trafficel.ru/strik?utm_term=premier+food+waste+disposer+manual PDF link annotation
    • https://dojebuxepoviguf.weebly.com/uploads/1/3/1/4/131407435/xuwozejigisusam_tozanitonaku_toguras.pdfIn PDF document text
    • https://jefogozadiz.weebly.com/uploads/1/3/4/0/134040800/xijutina.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5fa155a0ba462.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412382/normal_5fc372cc1551a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377379/normal_5fc40c7bdcf92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366654/normal_5f91551d27f31.pdfIn PDF document text
    • https://wikamarelifegef.weebly.com/uploads/1/3/4/3/134380256/9255568.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/jefobexapulow/portfolio_table_of_contents_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c39a290-9e5c-4a33-8192-029b17c2f393/tremere_clan_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6642324-1213-4ca0-adbf-18d68eadffc6/36834274630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cfa0105-a5ad-46ec-b15d-33e824f283ad/66401346484.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b0c82a8-4126-4e97-a42d-fe735e3babd8/68805618396.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_off0000cadb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADB 5280 bytes
SHA-256: a09007d1acdcdbd632b9efe48ce2bf2bfc047e6e0fdca2685826b6a139222a6d
font_01_sfnt_off0000dccb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCCB 11516 bytes
SHA-256: 46399f4f85e99c3e5bd0d6559850e3a3bf4d0b97d6403c349d1d5be29221a08d

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