Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d43ae353d64a597…

MALICIOUS

PDF

77.5 KB Created: 2021-03-13 19:49:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 2ce3eea7f13d71ba6c962053a8a0f329 SHA-1: 7d597c26479a44f48cc586db2b422175165987d4 SHA-256: 7d43ae353d64a59781e9c5ec5cd91664fb91b8ef245bcf2eaeff419e2cb33a00
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains or are used as redirectors, indicating a phishing or malicious content distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a phishing lure, likely intended to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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://jottigo.ru/strik?utm_term=color+a+course+in+mastering+the+art+of+mixing+colors PDF link annotation
    • http://salebobuja.iblogger.org/baby_girl_names_unique_2021.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464070/normal_6005c85fd0582.pdfIn PDF document text
    • http://vozuzutiwajuzip.getenjoyment.net/is_the_nook_tablet_worth_it.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379048/normal_6003a536a5ae9.pdfIn PDF document text
    • http://sefexetewizu.iblogger.org/how_to_install_dryer_outlet.pdfIn PDF document text
    • http://sabovibin.medianewsonline.com/medicaid_look_back_gifts.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426822/normal_6017502fa3144.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/bulalowisu/video_creator_app_apk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/825cf471-4880-4c3c-8ebf-8fc075d67fc6/diablo_2_cd_key_generator_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2b9f4f4-cb6f-4ff2-8ede-8c1c1f62fa68/grimgar_of_fantasy_and_ash_light_novel_volume_1.pdfIn PDF document text
    • https://s3.amazonaws.com/kukazowox/24203191645.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6f1a0f6-90d3-415b-acea-347a68e9b4eb/podadokigirapa.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/arborist_knot_guide.pdfIn PDF document text
    • http://titugol.atwebpages.com/sunbeam_water_cooler_ylr2-5-90hz3_manual.pdfIn PDF document text
    • http://botogokobule.rf.gd/cbt_worksheets_for_anger_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e4d2cf-298d-4e64-8b75-05e36989ef4d/a_court_of_wings_and_ruin_number_of_pages.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/pamphlet_design_template_psd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aedbbc85-38b3-4ebb-a447-e8f3fc0bce57/mental_health_assessment_tools_for_depression.pdfIn PDF document text
    • https://s3.amazonaws.com/ninasivol/14768680135.pdfIn PDF document text
    • http://jarujoburisuw.rf.gd/33899502537.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39b20c46-5e21-4b87-a04b-6cdde3d58214/graco_jogging_stroller_orange.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9bffb5d-82ea-4ed6-9bd3-673e088a7577/92420016280.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/619149f4-ebf0-4b68-8548-9843d607aff1/fikotikejov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fcc2c988-a768-4890-8384-159dfd3a71b4/38335918895.pdfIn PDF document text
    • http://wepexivir.epizy.com/kofilotemawokudoli.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_off0000f060.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF060 5268 bytes
SHA-256: 37d843f3988b96531146acdb6cd412a1ac9d02c45e0e4d976b403dc3f6e961fd
font_01_sfnt_off0001021e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021E 10504 bytes
SHA-256: 6e7a38bb918b1af1cd9fc391367a8d8c4b19d16b4c6a390a3a93643f8d2b160d