Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3ca722c93d8ae56…

MALICIOUS

PDF

80.0 KB Created: 2021-03-25 07:15:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 37269795006354bf186bae5bf6fa3dcf SHA-1: d7dfa4a9a711d88e558862b1191465ab1cf0f9a2 SHA-256: c3ca722c93d8ae560323c806b9ffc394155e15533327fb821b70b448ffb18e24
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to Weebly and other domains, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/wix?keyword=github+on+resume+reddit PDF link annotation
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/kababozux.pdfIn PDF document text
    • http://prizinsta24.online/transcendental_meditation_youtube31mss.pdfIn PDF document text
    • http://laitlabs.pro/how_to_read_1_8_architectural_scalejzhli.pdfIn PDF document text
    • http://amsidgi.xyz/rome_2_total_war_campaign_strategy_guidet3345.pdfIn PDF document text
    • http://help-feedback-amzn3.xyz/vpn_android_2._16bjae.pdfIn PDF document text
    • https://bamususifilozok.weebly.com/uploads/1/3/1/3/131383301/dedelalafesire.pdfIn PDF document text
    • https://getavefab.weebly.com/uploads/1/3/0/7/130739632/gajipizip.pdfIn PDF document text
    • http://mikrotikwizard.com/5000568759d99dn.pdfIn PDF document text
    • https://narivuwejuw.weebly.com/uploads/1/3/5/3/135310919/aca63f8.pdfIn PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/04efee70ac7a01.pdfIn PDF document text
    • https://wijuzibodeba.weebly.com/uploads/1/3/0/7/130738798/5358213.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/pusori/2019_harley_sportster_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/zuses/72142286844.pdfIn PDF document text
    • https://s3.amazonaws.com/regovadeje/excel_vba_cell_reference_another_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/juzowilipi/24724979845.pdfIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/tafitizomegowitepetatazig.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/industrial_attachment_report_on_procurement.pdfIn PDF document text
    • https://s3.amazonaws.com/sefabe/waburubaxuwumin.pdfIn PDF document text
    • https://s3.amazonaws.com/wuniku/office_365_admin_portal_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/fatisake/75077505160.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_off0000fcb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB0 4996 bytes
SHA-256: b0514e80f00d9e47e5c532b63cbae2dad755a68e756445ac711b982abbb57d9b
font_01_sfnt_off00010d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D7E 11024 bytes
SHA-256: 3cb4b773ef731bb808efc423f47ec43067e27f08662cdccf4ba33d0e52ff92c3

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