Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a742c41096e187…

MALICIOUS

PDF

75.3 KB Created: 2021-04-21 03:16:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: da3cd13e314a1ddfa3bb0a941a64fbdd SHA-1: 1dd51bc731e986dc902a32703a37ba8e82df0a50 SHA-256: 94a742c41096e18707b47c7943d2a20a4a13d45453818ed5bbe1bfbb30e54acd
126 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a suspicious domain, and is flagged as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a scam. Although no scripts were extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=can+you+get+too+much+oxygen+from+an+oxygen+concentrator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482631/normal_5fed588a0b80e.pdfIn PDF document text
    • https://cdn.sqhk.co/puxolika/jiYXSjf/fixamas.pdfIn PDF document text
    • http://stroymarketmetal.ru/banduk_ki_goli_dj_song1bunf.pdfIn PDF document text
    • https://cdn.sqhk.co/buzulexoxuve/egficus/43312519730.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445754/normal_60306cada10c1.pdfIn PDF document text
    • http://mexicotop3.xyz/vutetibijilimofn3w2u.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ifbHlsY/march_of_empires_guide_2019.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485929/normal_6063f46293963.pdfIn PDF document text
    • http://podcard2020.site/best_books_to_make_you_feel_goodp5igg.pdfIn PDF document text
    • http://fewotiza.iblogger.org/11th_class_chemistry_ncert_book_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_601b5605c5c19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_61e6aece726e40f19911e18ce06b5f84.pdf?index=trueIn PDF document text
    • https://13ea8442-998f-4f14-ba3b-7f37e53a414c.filesusr.com/ugd/008a9f_5689460cb1974e44957bfe99e65e0f49.pdf?index=trueIn PDF document text
    • http://nivigiwaragere.epizy.com/animals_vocabulary_with_pictures.pdfIn PDF document text
    • https://9169454a-6e45-4b39-89c4-5cd9bf0a6084.filesusr.com/ugd/32fbc8_0d40d06725924673826b0fa7f6acc3ab.pdf?index=trueIn PDF document text
    • https://e0220c8c-c322-4c33-af83-7c5b0fe00b66.filesusr.com/ugd/a771bd_d87b0d763e314d5b82c643835e2d8525.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c78b40f4-f6b5-4372-ab58-1f121565c22c/how_much_is_omnisphere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83a70ca3-7549-4ef9-8bcb-026403c6b9ba/midojuvizononofusebe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50ac19e-b902-4d19-9cd4-80015664e923/vanizagubagizimozotewodox.pdfIn PDF document text
    • https://16b16ea1-1eac-4681-bfdb-39d0b7b0c60a.filesusr.com/ugd/d6b497_d962dcc92f1c4c8f9b5e75bfaa8095c7.pdf?index=trueIn 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_off0000e98f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE98F 5160 bytes
SHA-256: f4e3d9b2a6756ab0ede4f56febf9262e9eaf1c51a134be7208089a706e0c481c
font_01_sfnt_off0000fb0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB0A 10768 bytes
SHA-256: 073d2c63f0381d0385ae9a71b5240ad89dd2a6033e4c48c73e877016fc9b5f77

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