Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce8bb2b4e2d9ed3f…

MALICIOUS

PDF

72.1 KB Created: 2021-03-01 08:46:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3886e7996c588de4a6989f6920514a2e SHA-1: 49b78e70eac572007cfc151b331b9711a748b442 SHA-256: ce8bb2b4e2d9ed3f2a37d5a456d25d2455188d363fa650a9d136d92d010d3886
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to S3 buckets and other domains, suggesting a link farm or phishing attempt. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. While no scripts were explicitly extracted, the PDF structure and link farm activity indicate a likely attempt to redirect users to malicious content or exploit vulnerabilities.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://bologen.ru/strik?utm_term=canon+lide+220+scanner+driver+windows+10+64+bit PDF link annotation
    • http://abwaab.su/measure_of_each_exterior_angle_of_a_regular_polygon_with_24_sideskigzb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369158/normal_5ff6690d4cc25.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389108/normal_600dcdbad41c8.pdfIn PDF document text
    • https://bunemanedadon.weebly.com/uploads/1/3/4/4/134476229/2084746.pdfIn PDF document text
    • https://mugevodotigo.weebly.com/uploads/1/3/0/7/130740084/nulatini_lajuxeva_madifumuvok_viroduxorev.pdfIn PDF document text
    • https://minojesifivu.weebly.com/uploads/1/3/4/8/134860027/7ac58.pdfIn PDF document text
    • http://itayoga.space/jamman_stereo_looper_solo_xth6wja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423454/normal_601908e9b17d1.pdfIn PDF document text
    • http://uchebnoe.website/xowixinuwedotabepsptys.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/varolexexus/sample_teacher_assistant_interview_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/cessna_414_ram_vi_performance.pdfIn PDF document text
    • http://turegipamikum.epizy.com/platform_shoes_goldfish.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/jorinipekofikuv.pdfIn PDF document text
    • https://s3.amazonaws.com/lanubili/driver_theory_test_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jebupofedijakuk/bogisavozoratiforopepo.pdfIn PDF document text
    • https://s3.amazonaws.com/fewifuwu/calibre_mac_10._6._8.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/joxuvorizot.pdfIn PDF document text
    • http://bixogonabu.epizy.com/equilibrium_constant_worksheet.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_off0000dbcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCD 5696 bytes
SHA-256: c6d4ddc21b07040d07d810f3a8c8ede823697fe856a303b175776790e915db5d
font_01_sfnt_off0000ef54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF54 10540 bytes
SHA-256: 89ea7383ac23a35edbd4634f6a75aab5f90d66ba45b43451456dfdc35715e2da

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