Malicious PDF — malware analysis report

Static analysis result for SHA-256 429fb2ac172e96a5…

MALICIOUS

PDF

80.5 KB Created: 2021-04-29 04:10:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 94cbb920769eb7b1798c883cbe0f5bf5 SHA-1: fa4fad65935e6690d4e21a9b9a8fdcd4afc35251 SHA-256: 429fb2ac172e96a5da8c0a778aa619f1a85472fc7a77338cd9c3221a02993d28
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several heuristics flagging it as a link farm on disposable hosting and a potential phishing or malware distribution vector. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the nature of the embedded links suggests an attempt to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://kuzutuzo.ru/strik?utm_term=positive+thinking+quotes+fathers+day PDF link annotation
    • http://bandalet.club/63450810463wp1m0.pdfIn PDF document text
    • http://mif-smeh.space/59101969008swnpf.pdfIn PDF document text
    • http://idealica-italy.site/35883053643r83qd.pdfIn PDF document text
    • https://cdn.sqhk.co/fagaluwozez/NiegfiS/word_bliss_all_answers.pdfIn PDF document text
    • http://goromeo.club/tork_1101b_timer_manual41wmr.pdfIn PDF document text
    • http://zuvels.xyz/wozijuxatohipzj.pdfIn PDF document text
    • http://coins24h.com/what_does_a_raven_mean_in_vikings4sh7t.pdfIn PDF document text
    • http://kino-vezde.ru/bosch_800_series_23.56_black_stainless_steel_built_in_dishwasher-shpm78z54njgfh0.pdfIn PDF document text
    • http://vekeludin.iblogger.org/jabodovabaresotegagekas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471275/normal_6048d6aec8f69.pdfIn PDF document text
    • http://cozyplacefor.rest/is_panda_express_orange_chicken_good_for_youj6ved.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419195/normal_6051b54495429.pdfIn PDF document text
    • https://cdn.sqhk.co/jegamaxegev/hhhhdZm/47702022702.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://voxixovizitu.epizy.com/ahmedabad_city_knowledge.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/15415097538.pdfIn PDF document text
    • https://s3.amazonaws.com/pexodugosa/miana_gondal_weather_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/22398205175.pdfIn PDF document text
    • http://bifapekedareb.rf.gd/georgia_driver_s_license_test_study_guide.pdfIn PDF document text
    • http://lowazuxakosilal.epizy.com/lifusegik.pdfIn PDF document text
    • https://s3.amazonaws.com/muvevanepen/goalkeeper_with_most_clean_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/tapexiw/mla_in_text_citation_template.pdfIn PDF document text
    • http://dizojid.rf.gd/chukkala_muggulu_chukkala_muggulu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8E 5372 bytes
SHA-256: f331d609fbf8ef260accdbdfdf5a3d1c9d9081a139c6bb5cc7cf0ad3974cc0bb
font_01_sfnt_off000100c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C9 10468 bytes
SHA-256: 3c6cbaecb493124c39d1d7f7d5bfa47ffc88561113afab8f52f5536b0e69f052
font_02_sfnt_off00012489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12489 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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