Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd5fbfee2b41d23…

MALICIOUS

PDF

76.7 KB Created: 2021-03-30 01:33:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b0b87b7ea8c4a02d147b5de1b289f881 SHA-1: f078459e3f7051e6171f5183e5ff41e18eb8b097 SHA-256: 3bd5fbfee2b41d23dd86b3122a940683eb6284be9bcce643009480ef4c53c984
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 5

  • 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 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://lozipotod.ru/award?keyword=life+after+death+damien+echols+free+pdf PDF link annotation
    • http://zuwifipenabed.medianewsonline.com/test_de_ansiedad_y_depresion.pdfIn PDF document text
    • https://garizoruzaxa.weebly.com/uploads/1/3/3/9/133986237/17831.pdfIn PDF document text
    • https://betirowi.weebly.com/uploads/1/3/4/6/134661799/zarugivowez.pdfIn PDF document text
    • http://tapozifokun.mywebcommunity.org/58962721517.pdfIn PDF document text
    • http://salonly.xyz/job_interview_questions_and_answers_in_hindirojij.pdfIn PDF document text
    • http://feludekinopotas.scienceontheweb.net/76840959980.pdfIn PDF document text
    • http://womuvizitina.mywebcommunity.org/nuwanufuxolupupuzurejedi.pdfIn PDF document text
    • https://kisumeselebo.weebly.com/uploads/1/3/6/0/136021012/3717938.pdfIn PDF document text
    • http://affilateapp.online/41394583931doaxz.pdfIn PDF document text
    • http://dusamoka.mywebcommunity.org/sedipukati.pdfIn PDF document text
    • http://stonersfranchise.com/the_merchant_of_venice_act_3_scene_4_analysis1qg25.pdfIn PDF document text
    • http://profibrend.ru/how_long_to_keep_sf_702tphtr.pdfIn PDF document text
    • https://pebogifi.weebly.com/uploads/1/3/1/4/131438694/finodixojuwamu.pdfIn PDF document text
    • http://majexifavel.scienceontheweb.net/pevutexefaxodudutosekef.pdfIn PDF document text
    • http://revilokepudidu.mygamesonline.org/hey_black_child_eugene_perkins.pdfIn PDF document text
    • http://matras-24.ru/kamanefasudovusemegenasatj1ugl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xutenasejubibe.atwebpages.com/encyclopaedia_of_islam_2nd_edition.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/pulazitupuguxakesadagexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74704d88-d12e-4108-ac10-1df3b4b940e8/78900631945.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/how_to_do_contract_negotiations.pdfIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/introduction_to_probability_and_statistics_for_engineers_and_scientists_4th_edition_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/fojaxexino/what_does_a_wrench_light_mean_on_a_2008_honda_accord.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/jasper_report_xml_datasource_example.pdfIn PDF document text
    • http://lupixopuvir.onlinewebshop.net/gotiz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2c3c5d1-2b1c-4462-8c6e-1d81e596f784/kenuzotifokub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3886ffbd-b5e6-42b5-8ecc-317f19d066a4/solving_quadratic_equations_by_graphing_worksheet_with_answers.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_off0000eed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED1 5336 bytes
SHA-256: e9d62eb7730bb9dd672daa8079ec00552c14b195cb6cf29e51d09d5e03eb8c10
font_01_sfnt_off000100d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100D5 10516 bytes
SHA-256: 107644c5a875353676c8deabb760e112b98aa5cfda9044fbc060e6ec4af54cd9