Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5f41dc20a38eca9…

MALICIOUS

PDF

92.5 KB Created: 2021-03-17 17:56:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: df78a172b8fe88ff4a4da33ca67a3c8c SHA-1: 5689126a351064e68ed69ec72173ed439fd39a34 SHA-256: d5f41dc20a38eca91c96e5424f3f80418da5313d385872e23df6bc6f7b58ebf2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9992

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://kuzutuzo.ru/strik?utm_term=my+toshiba+tv+blinking+red+light PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4498978/normal_5fdf9753741ba.pdfIn PDF document text
    • https://cdn.sqhk.co/bebumila/jgjcTSa/toyota_altezza_1gfe_performance_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/xoxamomajil/hbjeKhe/school_teach_learn_english_as_a_second_language.pdfIn PDF document text
    • http://choosemadam.site/sizonuxitowofukuwivagist4uh.pdfIn PDF document text
    • https://cdn.sqhk.co/rumoligodo/gig9Cau/juresafelajefi.pdfIn PDF document text
    • http://devazabekodum.iblogger.org/what_is_business_organisation_and_types.pdfIn PDF document text
    • http://rosebip.22web.org/xuxuve.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/ijjgge8/lororezewunusibonowoza.pdfIn PDF document text
    • http://itdiscounts.pro/67907462195jc3vf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485448/normal_5ffcf5cd0f662.pdfIn PDF document text
    • https://cdn.sqhk.co/niturunajik/S3Ohajj/thor_ragnarok_soundtrack_ac_dc.pdfIn PDF document text
    • http://flymoney.net/what_caused_enlightened_absolutismyyf9m.pdfIn PDF document text
    • http://lokotahas.ru/9949835750354hv7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392667/normal_5fcd60ebc7a49.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/YXkhfii/90239155952.pdfIn PDF document text
    • http://cmb-eco.com/best_way_to_learn_figure_drawing17fhn.pdfIn PDF document text
    • https://cdn.sqhk.co/rozesivotix/cY4ibLx/pamijubutogirotesudole.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/c7a3b4f1-6a00-4244-8869-643f90cfd36b/42525138980.pdfIn PDF document text
    • http://dopelatov.epizy.com/gcse_english_language_and_literature.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c355a24-4a10-40d0-a572-8d1340f6e81c/88920083521.pdfIn PDF document text
    • http://tepusijanakigat.epizy.com/wafazusavosifenaxakezejiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a7b59f-65f5-445c-9b58-264a3e2393c4/nusereja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab32a7a0-f358-4b85-952e-7ee6b020a14a/5586793150.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_off00012366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12366 5456 bytes
SHA-256: acb51db46cd8ec076e3bf0e49246c8c9cf076204d3192a65a5d6bb518da8d9e8
font_01_sfnt_off00013604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13604 14284 bytes
SHA-256: 2babaad98699084806d85bfce98000ac7e01a09bcedcb1541db612a3264b51f8

Open this report in the interactive analyzer, or submit your own file for analysis.