Malicious PDF — malware analysis report

Static analysis result for SHA-256 df5400c713720a75…

MALICIOUS

PDF

74.9 KB Created: 2021-03-09 20:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 51391adbf5e964a6610d3b8b16ef8122 SHA-1: 6baa27ee07bbc92836bef9977bed5470f828dc8d SHA-256: df5400c713720a75906976e7df5c584d6d7188911f3b80b233f054d7dc9ee28b
186 Risk Score

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 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=dbt+therapy+training+nz PDF link annotation
    • https://cdn.sqhk.co/wenejusuzixe/Cge1xiy/bike_rider_3d_model.pdfIn PDF document text
    • http://mnatural.space/sureramavudozubixazusulnl9an.pdfIn PDF document text
    • http://todayshop.website/trigonometric_identities_sum_and_difference_formulasxfh5l.pdfIn PDF document text
    • https://cdn.sqhk.co/nowagenika/fiiggd5/59693525980.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/bhipgjW/tadafibunutagubime.pdfIn PDF document text
    • http://mirijesuwakug.sportsontheweb.net/can_you_teach_yourself_wing_chun.pdfIn PDF document text
    • https://cdn.sqhk.co/setupemup/cNAihqd/puzaxugof.pdfIn PDF document text
    • https://cdn.sqhk.co/bexefoboxevi/hghe4if/32899841649.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuzobisu/fn5QXYr/rixexeral.pdfIn PDF document text
    • http://nesobaka9.xyz/83597430197exsfv.pdfIn PDF document text
    • https://cdn.sqhk.co/pogezasamu/CUgcsif/legitafo.pdfIn PDF document text
    • https://cdn.sqhk.co/jukowejazus/eif938u/97505542686.pdfIn PDF document text
    • https://cdn.sqhk.co/tuseliwi/1SjaJia/statement_balance_vs_minimum_amount_due.pdfIn PDF document text
    • https://cdn.sqhk.co/nagebagem/dphcrjh/carpet_cleaner_rental.pdfIn PDF document text
    • http://nokasosozigof.mypressonline.com/kaputulipofakoxisi.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/fodose/febipoviwegoju.pdfIn PDF document text
    • http://zitadufafasid.onlinewebshop.net/bajatejagodomo.pdfIn PDF document text
    • https://77483064-5892-4b52-b419-66e751946b77.filesusr.com/ugd/ef7b09_9c283786209e4338aff41bfbe0d14590.pdf?index=trueIn PDF document text
    • https://35057dd6-1d18-4acd-96c9-af3b7fddc7cd.filesusr.com/ugd/978dd5_7b791978f0724098b9be4e06b6a15cff.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sirilagewuga/network_advisor_brocade.pdfIn PDF document text
    • https://s3.amazonaws.com/lepefi/bticino_living_now_catalogo.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/47183532033.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/clubbers_guide_to_ibiza_summer_2000.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_off0000e76a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76A 5164 bytes
SHA-256: b3f78d0943aa0dfa5319f25d9cdec43e255d39d49fab7db7caa6363bb46b55b1
font_01_sfnt_off0000f90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 10880 bytes
SHA-256: 968e12612bc54f9cbc5cc97723bed83ab7bf8f79660fe2d76437382c95f23cd1

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