Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c82905322afe50…

MALICIOUS

PDF

75.9 KB Created: 2021-04-07 11:01:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f8c3d39a5cf549309e376e9f8b86d93a SHA-1: 14d9dec2dc14a820aa53dda3e5e3fb201b7875e4 SHA-256: 34c82905322afe50b9b2f38f889eea90e19e893aadc1a24fb045820c8fd96c83
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 0.9991

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 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://jacksth.ru/strik?utm_term=spelling+books+for+kindergarten PDF link annotation
    • https://jaserasozupog.weebly.com/uploads/1/3/1/4/131454215/3627048.pdfIn PDF document text
    • https://maloxozalujov.weebly.com/uploads/1/3/4/6/134624338/16ae963a.pdfIn PDF document text
    • https://mumilupoj.weebly.com/uploads/1/3/5/3/135351188/kapojasuvonevul.pdfIn PDF document text
    • https://gibuximo.weebly.com/uploads/1/3/4/6/134665594/loked_dipijabururolim_vuwupax_selukizu.pdfIn PDF document text
    • https://gizumefelaz.weebly.com/uploads/1/3/4/3/134318195/pavaga_namosazab_diwonolelodajed.pdfIn PDF document text
    • https://toxodapakaxoza.weebly.com/uploads/1/3/4/5/134525452/4707841.pdfIn PDF document text
    • https://revotilam.weebly.com/uploads/1/3/4/7/134732497/gonute_nowom.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/3ac766ad1.pdfIn PDF document text
    • https://tonavamajarow.weebly.com/uploads/1/3/4/6/134694337/6208648.pdfIn PDF document text
    • https://nigiseza.weebly.com/uploads/1/3/4/4/134462574/zatudew.pdfIn PDF document text
    • https://nilezejexi.weebly.com/uploads/1/3/4/7/134737846/829cb2a0b63897.pdfIn PDF document text
    • https://kixivoveluvib.weebly.com/uploads/1/3/0/7/130775150/joxelepuvig.pdfIn PDF document text
    • https://xososikanezav.weebly.com/uploads/1/3/4/8/134892973/ff6fee31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/329c31df-be8a-41e9-9c9b-3843fbd4209d/how_to_turn_on_a_sportdog_shock_collar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6987af1c-bcaf-44ee-95c7-0b3e6f76a5d4/nzm_hikmet_iirleri_ksa.pdfIn PDF document text
    • https://s3.amazonaws.com/palikuvexake/sorting_3d_shapes_worksheet_year_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd3bac0c-2ea0-4136-8641-a005bc48132d/stranger_in_a_strange_land_movie_keanu_reeves.pdfIn PDF document text
    • https://s3.amazonaws.com/juwofuxufijup/vipadovijewavetamomibo.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/commodity_technical_analysis_chart_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/sigmund_freud_theories.pdfIn PDF document text
    • https://s3.amazonaws.com/zowejunef/75095708859.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13a740ae-0bb4-4654-96bb-fc57e6751919/xoteporiwodovomebe.pdfIn PDF document text
    • https://s3.amazonaws.com/gotijejaj/ifrs_conceptual_framework_for_financial_reporting_2010.pdfIn PDF document text
    • https://s3.amazonaws.com/jaloto/monajatak.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/92267334802.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_off0000ebc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC3 5516 bytes
SHA-256: 7f003677ffa83fe1005c6aa902498633dd145f61b53f8dc211868e6c5fdc169a
font_01_sfnt_off0000fe8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8D 10404 bytes
SHA-256: 8ba0c0a0481cb2cf919691a98dbc56e1634d6daf44fcfd460addf775cc34c757

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