Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1e1159814e2bc8f…

MALICIOUS

PDF

69.4 KB Created: 2021-04-02 02:00:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c95c54e628a5bfe872299a25e30b2f65 SHA-1: 88851adec928e4f0e9c84ec4129e1f8fb33b0ee5 SHA-256: b1e1159814e2bc8fb8575b5efa2f5c936dc319ca1b578047096ba7dafb5da378
186 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 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://dugedepap.ru/strik?utm_term=2002+ford+explorer+sport+trac+parts+manual PDF link annotation
    • https://cdn.sqhk.co/liguvikozo/JeUhaii/jharkhand_pds_rice_vitran_report.pdfIn PDF document text
    • https://nanowoduz.weebly.com/uploads/1/3/1/4/131414019/9691443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449775/normal_604e4db9dabac.pdfIn PDF document text
    • http://sdek-24.cc/ssc_stenographer_mock_test_downloadqjcz6.pdfIn PDF document text
    • http://sodahq.club/59986591978385zy.pdfIn PDF document text
    • https://cdn.sqhk.co/giwitosak/fcicLtp/25681470452.pdfIn PDF document text
    • http://13millions-warzone.store/47104351948o34nz.pdfIn PDF document text
    • https://xesufomoma.weebly.com/uploads/1/3/1/0/131070197/sirixavubifem.pdfIn PDF document text
    • http://lnstagramoriginal.com/soxizevecka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463807/normal_5fd64205957b9.pdfIn PDF document text
    • http://vajemax.22web.org/dungeons_and_dragons_film_cast.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389104/normal_600741c792a3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381964/normal_5ffb85f4163b1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://bbaef297-c986-4b42-acb3-0fd65605e280.filesusr.com/ugd/e9fc71_bc9cbdb33ca145599a871fcd3c3004bc.pdf?index=trueIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_defb60d5cd3f4ec58fb11c3102a32fb2.pdf?index=trueIn PDF document text
    • http://xojogaregukuged.rf.gd/matrimonial_biodata_format_for_girl.pdfIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_01163100abeb45afbf26e10906f6e633.pdf?index=trueIn PDF document text
    • http://fanuzisi.epizy.com/tatorerutojijonetuxozitel.pdfIn PDF document text
    • https://e5eb5b25-b33c-43e3-82d5-57ab1bf863d8.filesusr.com/ugd/b0c717_5aecd0c2b1b048ada06091d7e84dba3d.pdf?index=trueIn 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_off0000d342.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD342 5548 bytes
SHA-256: eb5a99e51922e1761c0e1167424bf0c44385a0bd02425208bac6ccbac230af3e
font_01_sfnt_off0000e610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE610 10108 bytes
SHA-256: b3110e724b5e24a78b27cba409c10d352cec08709b1056e27ca5a27e320e8bbe

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