Malicious PDF — malware analysis report

Static analysis result for SHA-256 8418628bce021e93…

MALICIOUS

PDF

82.7 KB Created: 2021-03-20 06:29:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 231cd8a7c209c301a7c8df9f607e7cd5 SHA-1: 2c33558a0dd718d0f138b45139c231ef11e2559a SHA-256: 8418628bce021e9385b8a5e59fbc40ec415e3dbf035a47f1798bc69d7abdfb78
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting it's designed to redirect users to potentially harmful sites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://zajinet.ru/strik?utm_term=how+to+get+seeds+from+lettuce PDF link annotation
    • http://mosuxuvemuzuwex.mywebcommunity.org/what_does_as_a_man_thinks_in_his_heart_so_is_he_mean.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/OUXViht/pro_mx_3_mod_apk_1._0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447903/normal_602405fff2336.pdfIn PDF document text
    • https://cdn.sqhk.co/minamojazi/6kagjji/wutodafipuvi.pdfIn PDF document text
    • http://shopyou.online/l2d99.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450249/normal_60209061aed58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455390/normal_603f683cf0442.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/67627003600.pdfIn PDF document text
    • http://sokobumoxagug.scienceontheweb.net/cdpo_question_paper_2020_download.pdfIn PDF document text
    • http://easycreditscore.info/nofataviziiuy61.pdfIn PDF document text
    • https://winenexosipagep.weebly.com/uploads/1/3/2/8/132814343/dabile.pdfIn PDF document text
    • https://cdn.sqhk.co/setuboluraje/nidWiiM/defurujomiforuzige.pdfIn PDF document text
    • http://1eyvgo.xyz/jexipiqqo2p.pdfIn PDF document text
    • http://chestlune.online/letra_completa_del_himno_nacional_de_honduraswz47x.pdfIn PDF document text
    • https://cdn.sqhk.co/silonifer/jfhcHic/bentham_science_author_guidelines.pdfIn PDF document text
    • https://ropexosuwewi.weebly.com/uploads/1/3/1/3/131380205/5749439.pdfIn PDF document text
    • https://bovusobovazova.weebly.com/uploads/1/3/4/5/134596491/zaruvo.pdfIn PDF document text
    • https://sapezirotup.weebly.com/uploads/1/3/4/5/134576964/wuzisopivixutibizob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454304/normal_5fd99ea8e7413.pdfIn PDF document text
    • https://cdn.sqhk.co/lasanamemego/hgzibru/best_adventure_motorcycle_tyres_2020.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gitojaxekeveki.onlinewebshop.net/canada_map_with_capitals.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ea3e64-7729-4ffa-8c35-7ace1fa433c4/92464231629.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da05093-842f-487a-8ed0-01e09e7643e0/78157027694.pdfIn PDF document text
    • http://tameladizikep.atwebpages.com/sudisev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef118c0-2981-49a8-b125-dd0794f843ff/how_long_is_maxcare_warranty.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7eb1878c-521b-454d-9925-29088f758944/transformer_sizing_calculation_formula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0ce67ced-14a2-45f5-af7e-faee0cb715a7/danidiwemet.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_off000102c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C2 5184 bytes
SHA-256: 62aa583957274f42c322a81cfb7090ba3427904d3ead736d35d790d2439c54c2
font_01_sfnt_off0001146b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1146B 12704 bytes
SHA-256: 4b6fcf50245fcae9d64585f259467f45b644c0738898a9ed463b351c084d51ca