Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f00458f030ef869…

MALICIOUS

PDF

90.2 KB Created: 2021-03-04 22:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: fbaa8919a4d64d4f226769294f1b983a SHA-1: 55b54654a9c18c2b0a5ad4f5b37d9683a079fcb6 SHA-256: 9f00458f030ef869644439ed3f0fb8b7d4ec8f44f90742ae7c5ab4c0d59f23cc
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://baarspo.ru/aws?utm_term=frases+de+colorin+colorado+este+cuento+aun+no+se+ha+acabado PDF link annotation
    • http://tosefabebiribow.scienceontheweb.net/junupoxedike.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468837/normal_6021a42b396a1.pdfIn PDF document text
    • https://cdn.sqhk.co/moxelutedoje/h81gdSy/legends_bar_and_grill_lighthouse_point.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450248/normal_6024f52e5b798.pdfIn PDF document text
    • https://cdn.sqhk.co/rivogigaweb/jjgfnnk/44922401177.pdfIn PDF document text
    • https://cdn.sqhk.co/poxirowo/WehaQgh/74078694112.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479674/normal_5ff9bcb158ae7.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/tubupejevomo/phonic_worksheets_for_year_2.pdfIn PDF document text
    • https://ac3db616-04cb-40f1-8357-c67041f5e20c.filesusr.com/ugd/eda9ba_0ee6129c88d94cd7a91b5e28a6f75db8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/video_converter_untuk_android_terbaik.pdfIn PDF document text
    • https://s3.amazonaws.com/legenapi/ba_exam_date_sheet_2019_agra_university.pdfIn PDF document text
    • https://s3.amazonaws.com/juzewojavomofew/murataxitewatigemasadu.pdfIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_0c1da895288d4c369279ec3e4967e9d3.pdf?index=trueIn PDF document text
    • https://b9e1b105-38e0-4bbf-baad-90de1e2021e1.filesusr.com/ugd/432b07_56884a5e47e549a2bcd7c71ed136dc4a.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jojitagifuva/12805625061.pdfIn PDF document text
    • http://vidugozu.atwebpages.com/sims_3_for_mac_steam.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_off00012351.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12351 5124 bytes
SHA-256: eb5af4c25db2a21aacd43ff1d6ba602c64e357d616ed694c4f96aa79c3cd5b29
font_01_sfnt_off000134ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134AD 11968 bytes
SHA-256: 8ce76cec94c819cfc50df1f69efa5f9c6cba1c9be1b7c70a6f6d15c6e29ecf08

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