Malicious PDF — malware analysis report

Static analysis result for SHA-256 2436b007427c78e4…

MALICIOUS

PDF

76.9 KB Created: 2021-05-11 23:04:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 5e3eb6ab8c7c950f3f92fd74e1884e70 SHA-1: 723490787f332749616a640e88f6cac597a06a87 SHA-256: 2436b007427c78e4319dfb176fc6f6b14f612c64af7e438de595fc7d859a8bf1
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://ponafet.ru/strik?utm_term=is+blood+glucose+monitor+accurate PDF link annotation
    • http://buwubaled.mywebcommunity.org/aliments_riches_en_protines_musculation.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5fd9bc6ac7432.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416938/normal_5fe5d43c035c3.pdfIn PDF document text
    • http://vatamuvemazaril.sportsontheweb.net/79463864789.pdfIn PDF document text
    • http://wopexobow.mywebcommunity.org/30366884581.pdfIn PDF document text
    • http://molefomisapeput.mypressonline.com/89740008371.pdfIn PDF document text
    • http://gunenekaroz.mypressonline.com/reasoning_aptitude_questions_and_answers_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422876/normal_6043e9d0281e6.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/fopalew/ozark_trail_led_rechargeable_lantern_replacement_battery.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_6b19741ae9ad40c885f0b508b834779e.pdf?index=trueIn PDF document text
    • https://6f1239e7-da96-47bf-8adb-22d47a96a9da.filesusr.com/ugd/bb5a15_26c0f00e1fa64795a3533fa3d46517e0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zakunafu/los_rios_de_color_purpura_pelicula_completa_en_espaol_latino_descargar.pdfIn PDF document text
    • https://s3.amazonaws.com/wowonesoribu/dutetijipas.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/aditivos_para_concreto_sika.pdfIn PDF document text
    • https://78a3f932-2eca-4366-91b9-d52a2f3c5f58.filesusr.com/ugd/a586f9_71699d691665468f830fbaab24ccdabb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xanunafojuloki/little_blackfoot_river_montana_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/frigidaire_gallery_electric_range_parts_list.pdfIn PDF document text
    • https://cd9ed9ec-87d1-42be-9198-0b2de6c1db4d.filesusr.com/ugd/158fb9_bfab6fa63fa44c91b34474b3b7f2d64e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dazovosugev/bmw_x2_manual.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_af019250cc4c48fb92f6ac92eadb2aaa.pdf?index=trueIn 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_off0000ee16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE16 5336 bytes
SHA-256: 96cb736cee71678ccdff7f3bca0a099bb3a3535acc856e2b15671d2614334c02
font_01_sfnt_off00010021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10021 11292 bytes
SHA-256: f86f97fdc80f7e90ea2897fa2d1f0adcf0199e466777ec06e8828a6870bce591

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