Malicious PDF — malware analysis report

Static analysis result for SHA-256 40c541476896c2cb…

MALICIOUS

PDF

77.9 KB Created: 2021-03-24 04:01:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3b6246f8733368326f58ed242c18952e SHA-1: 1721f7a1ad6a2432a9f5a5630659a5de0bf83937 SHA-256: 40c541476896c2cbc616bdf9f7721a3e6b2032ec021c85d702fc8648657db7b1
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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 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://vilenefex.ru/123?utm_term=work+instruction+template+manufacturing PDF link annotation
    • https://wakevilapiz.weebly.com/uploads/1/3/4/9/134903367/zunev_lafiri_kevovirotagow_jadizugujas.pdfIn PDF document text
    • https://revixapega.weebly.com/uploads/1/3/4/6/134619396/zowopeboruw-linetokaxuviw-zulebamotelakut.pdfIn PDF document text
    • http://useraisins.pro/duwuxonitaxutulafufopl1xfa.pdfIn PDF document text
    • https://fanolukexepafo.weebly.com/uploads/1/3/0/9/130969893/b149e4b9d.pdfIn PDF document text
    • http://legegapepapo.medianewsonline.com/algebra_2_holt_online_textbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465403/normal_6041f43d9f3c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405907/normal_602834dba8dae.pdfIn PDF document text
    • https://bematurom.weebly.com/uploads/1/3/4/8/134886193/zuvewuwilivego.pdfIn PDF document text
    • http://wumiwuzigimo.mywebcommunity.org/american_history_trivia_easy.pdfIn PDF document text
    • http://reduslimitaly-official.site/zumalexidunenobalf3z4w.pdfIn PDF document text
    • http://dulugidi.iblogger.org/white_and_rodgers_programmable_thermostat_manual.pdfIn PDF document text
    • http://repair-kompov.ru/javojisamapep3a32f.pdfIn PDF document text
    • http://genoray.pro/fenofoxifilotirazadirajugpu2ir.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375199/normal_5ff2015a93df3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/681545ea-988a-4d78-a513-e7f07a124819/manual_camara_canon_powershot_sx710_hs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2bd3b0e-54ef-4842-bfe7-b0a5bd0ba3c6/31477083384.pdfIn PDF document text
    • http://lukovim.epizy.com/osha_injury_reporting_guidelines.pdfIn PDF document text
    • http://gutezapirasawad.rf.gd/new_york_state_police_report_contributing_factors.pdfIn PDF document text
    • http://gogamejotu.epizy.com/77472477215.pdfIn PDF document text
    • http://jaweratiz.atwebpages.com/behold_a_pale_horse_deutsch.pdfIn PDF document text
    • http://zilazop.rf.gd/mango_production_guide_in_the_philippines.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_off0000ef5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5C 5412 bytes
SHA-256: b36174f3e0dce935cd7516ba2d19bf748039b18a9eacce75149cec48af1e051d
font_01_sfnt_off000101c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C9 11980 bytes
SHA-256: 11c7239420535e3d0f49f68ad578809d25d3d0be313c193807c35c714f23210b

Open this report in the interactive analyzer, or submit your own file for analysis.