Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed0cd5286e1ac3f…

MALICIOUS

PDF

72.4 KB Created: 2020-11-28 22:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 954d640fd8a787fa99293b2e38dea48f SHA-1: 8e0439a4445356e3f192e8078cd2b4bd08b7f533 SHA-256: eed0cd5286e1ac3f3960b9b120cd1ac7215e3d95a7662c1a6ff046edd2cd00cf
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://trafftec.ru/123?utm_term=morphemic+analysis+strategy PDF link annotation
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/7237958.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_5f9bbb266a912.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/wofokiziluviv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371240/normal_5f8e0d516a7c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f87307798561.pdfIn PDF document text
    • https://lobobofu.weebly.com/uploads/1/3/4/6/134680821/db2168efb8e5025.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382789/normal_5fbc6fd6eb734.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385207/normal_5fbd23fda9bac.pdfIn PDF document text
    • https://ruvipubelid.weebly.com/uploads/1/3/4/6/134608961/d414694cfc1ef5.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/lewuli/1.1.4.5_packet_tracer_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/how_to_dance_in_roblox_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/reply_to_complaint_email_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/alphabet_practice_worksheets_preschool.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/business_school_book_in_tamil.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/subject_verb_agreement_worksheet_grade_6.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_off0000ddbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBF 5456 bytes
SHA-256: 5d38d7673b6f5a8776de8fbb26f638053f14441bec04f3afe3795d70b9e165f6
font_01_sfnt_off0000f032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF032 10828 bytes
SHA-256: 1d6bd94c3a5347511de4fc2cac364545b109375bb24c2ee8e9e5d6ba6f8e20e9

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