Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d5c79269a7c45be…

MALICIOUS

PDF

91.3 KB Created: 2021-04-15 03:55:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fb217b857a05107f495a8a0893545854 SHA-1: d759f11f19204fab10f5afa80d5081c5c8e5973d SHA-256: 8d5c79269a7c45be9adf52006ccc45628e7b4c52d72635c5e2bbafaeea379c54
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 0.9993

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://maypoin.ru/strik?utm_term=craftsman+electric+chainsaw+2.00+14+manual PDF link annotation
    • https://kexexetipo.weebly.com/uploads/1/3/4/8/134897314/a377aebb982b5a.pdfIn PDF document text
    • http://pawusewi.sportsontheweb.net/articulation_development_chart.pdfIn PDF document text
    • https://kusavavatixe.weebly.com/uploads/1/3/4/8/134878613/6043655.pdfIn PDF document text
    • https://rosujukasawi.weebly.com/uploads/1/3/5/3/135301647/xozijadez.pdfIn PDF document text
    • http://jarewitof.mypressonline.com/iowa_biennial_report.pdfIn PDF document text
    • https://dizogesutupini.weebly.com/uploads/1/3/4/6/134631076/7583287.pdfIn PDF document text
    • http://xoroketogejuxe.mywebcommunity.org/zarutumivozomagugojili.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/146be18c-0224-4de0-b777-eb6b468c50dd/45868393461.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/542cd89c-0276-4352-8e10-25a976f552b9/lemizorakefow.pdfIn PDF document text
    • http://roxoretubobo.rf.gd/angioplasty_procedure.pdfIn PDF document text
    • http://dogufisojorosef.epizy.com/defosefiwomomowevo.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/76869083810.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/finukomexojupevo.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/jiwevajifupotonobiz.pdfIn PDF document text
    • https://s3.amazonaws.com/degisapemifa/shinchan_tamil_comedy_videos_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dosipive/16555423752.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b31071d0-f2a0-46f8-a3ac-1767711798f8/what_is_a_summary_statistics_table.pdfIn PDF document text
    • https://s3.amazonaws.com/lusegokaves/the_bard_s_tale_mega_mod_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a6fd378-aee9-49e2-b104-7d6a53cd620c/how_to_descale_my_nespresso_lattissima_machine.pdfIn PDF document text
    • http://ninijoziwedef.rf.gd/26137451337.pdfIn PDF document text
    • http://fefekakase.epizy.com/38859328743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe35ebf-054e-4c91-82c3-8f7e9ae72833/kavilenamuwi.pdfIn PDF document text
    • http://doruzedom.epizy.com/advanced_technical_analysis_books.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_off000122ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CE 5564 bytes
SHA-256: aa9485296e1427d3445d171a3fd6b66008a029ed09cafe1ade475e4bfd6d04ed
font_01_sfnt_off000135af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135AF 13112 bytes
SHA-256: 43966d883b194858d5056e7e94d1a016f7b3bd22e7a63e179246713efbf54495

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