Malicious PDF — malware analysis report

Static analysis result for SHA-256 0bafe3837fa024a9…

MALICIOUS

PDF

80.0 KB Created: 2021-04-05 22:14:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e72bc571342275af0254abcded7ac139 SHA-1: 6cced69c21679d3c216ff456df1256920f6ae139 SHA-256: 0bafe3837fa024a9e8279c0585052288ed7585a0dd7cea053e790848d66c604d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://ponafet.ru/wix?keyword=bell+bike+trailer+manual PDF link annotation
    • http://xogavuw.medianewsonline.com/biology_cape_syllabus.pdfIn PDF document text
    • http://it50life.pro/71048674570uyvp.pdfIn PDF document text
    • http://nakanilo.club/sixavivudezezebelnnwcn.pdfIn PDF document text
    • http://winnerslm.space/microsoft_onenote_manualgvflb.pdfIn PDF document text
    • http://zovolexune.sportsontheweb.net/wexideterilujarulorosu.pdfIn PDF document text
    • http://befujukipepejem.mygamesonline.org/88871959834.pdfIn PDF document text
    • http://medtechnika1.ru/611484592107924m.pdfIn PDF document text
    • http://titoto.xyz/4094575141432zgv.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/pallet_jack_cylinder_repair_kit.pdfIn PDF document text
    • http://casbah2point0.com/buongiorno_italiaijeik.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/jj_benitez_caballo_de_troya_8.pdfIn PDF document text
    • http://noguwizipipolom.iblogger.org/books_on_essay_writing.pdfIn PDF document text
    • http://pakaxofuj.sportsontheweb.net/gapigawalulitin.pdfIn PDF document text
    • http://vonokumi.iblogger.org/ashrae_handbook_of_fundamentals_2020_free_download.pdfIn PDF document text
    • http://usejus.pro/wofunimejilowj31n8.pdfIn PDF document text
    • http://giwitijudaleka.mygamesonline.org/nextbook_ares_11_update.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://zinuruxe.epizy.com/concepto_de_energias_renovables.pdfIn PDF document text
    • http://bumilofu.rf.gd/29103723151.pdfIn PDF document text
    • http://sutexuvidag.myartsonline.com/c_function_reference_pointer.pdfIn PDF document text
    • http://kawerulim.onlinewebshop.net/43979727690.pdfIn PDF document text
    • http://wefexafunedex.epizy.com/cheat_engine_6._4_softonic.pdfIn PDF document text
    • http://bibibojusajol.rf.gd/aceable_level_3_assessment_answers.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_off0000efe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFE8 4680 bytes
SHA-256: 59769918daf9273e7a700dd69d080f79cbd3a9e09ff9cd1753bac6d6f9ed6bde
font_01_sfnt_off0000ffac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFAC 10800 bytes
SHA-256: 982d9693c600e8d2de0e7511b3d44fe43260c8870c58c80cb89262e0216c3b71
font_02_sfnt_off000124a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A7 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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