Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d950d782d746583…

MALICIOUS

PDF

75.8 KB Created: 2021-03-29 23:19:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 21e81181db7348b0401cc706d04093d9 SHA-1: 3ffc4625fd0100b92b00d3251a9cdb4e23248607 SHA-256: 5d950d782d746583ec5521d0746268c389210beeb16a64e1129e71ba7dd5723a
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'nipisod.ru', which is likely a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=pretty+little+liars+season+3+halloween+episode+costumes PDF link annotation
    • http://kaboliwup.mypressonline.com/pamin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_5fdb7baa53f1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460680/normal_6019f0ca8619c.pdfIn PDF document text
    • http://ruwulabosubev.iblogger.org/asthma_treatment.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379722/normal_5ff37827d30bc.pdfIn PDF document text
    • http://securityverifiedservices.com/35847910325l67d9.pdfIn PDF document text
    • http://sufawevugut.mywebcommunity.org/lasebotetalomolad.pdfIn PDF document text
    • http://posebakuxosafod.getenjoyment.net/puvifuxeremuzu.pdfIn PDF document text
    • http://static-start.top/630235997778oyi9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485828/normal_60546470630de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476147/normal_601dcf658a49e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fadadedezeker/rakogobozenurosixapibonog.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/conjunction_formal_definition.pdfIn PDF document text
    • http://tevefetilojas.atwebpages.com/2002_ford_explorer_4.0l_engine_diagram.pdfIn PDF document text
    • https://s3.amazonaws.com/jezobasit/what_causes_a_honda_lawn_mower_to_backfire.pdfIn PDF document text
    • https://s3.amazonaws.com/moduxanakuri/archon_pc_game_free.pdfIn PDF document text
    • http://fesejawezu.rf.gd/email_extractor_lite_1._6.pdfIn PDF document text
    • https://s3.amazonaws.com/dukajevo/pelirewuxaj.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/literary_analysis_of_comic_books.pdfIn PDF document text
    • https://s3.amazonaws.com/jowutoneranemuk/tagigenix.pdfIn PDF document text
    • https://s3.amazonaws.com/tokudapele/20198617945.pdfIn PDF document text
    • https://s3.amazonaws.com/negonanopix/breakfast_at_tiffanys_book_genre.pdfIn PDF document text
    • http://lodusuvixad.rf.gd/69630439570.pdfIn PDF document text
    • http://rofuvawitarul.atwebpages.com/14843344943.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_off0000e9b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B9 5672 bytes
SHA-256: dfe266796d685cfab15dc82da5aa8b16911d6572d4ca3199adf709c1bf76a723
font_01_sfnt_off0000fcef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCEF 10588 bytes
SHA-256: a0f0bff780f1a2e262a1593e37c988296b3ef358b768102b1732db551dd48ea5

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