Malicious PDF — malware analysis report

Static analysis result for SHA-256 f935f5ccd3a48ffa…

MALICIOUS

PDF

1.32 MB Created: 2021-03-17 10:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a302d9f0ebb8827e74295487cfa33442 SHA-1: 212a2ff509030cdff8689aba51629d3da9995f20 SHA-256: f935f5ccd3a48ffa36c3648ec4903c28c01aaf90c7bbc540b502dab59822a8f3
74 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a specific signature indicating phishing and trojan activity. The document contains urgency lures, suggesting a phishing attempt. An external URI pointing to 'zajinet.ru' was extracted, which is likely the malicious destination. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing attack.

Machine Learning

  • Nyx PDF Classifier clean score 0.0237

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
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=for+your+improvement+table+of+contents PDF link annotation
    • https://cdn.sqhk.co/fuvepiwedo/jd1Shid/qr_barcode_scanner_apk_free_download.pdfIn PDF document text
    • https://desebenenoda.weebly.com/uploads/1/3/5/3/135348916/sazigo.pdfIn PDF document text
    • https://cdn.sqhk.co/xegigujatefa/knRibia/19195419517.pdfIn PDF document text
    • https://cdn.sqhk.co/mupalewefe/V2Pmigq/cupcake_recipes_choc_chip.pdfIn PDF document text
    • https://cdn.sqhk.co/moserusoba/igQlhgb/81506531230.pdfIn PDF document text
    • https://womegirig.weebly.com/uploads/1/3/4/5/134506381/pajil-suwoso-lewusexinelalo-lodofidolinoxuz.pdfIn PDF document text
    • https://cdn.sqhk.co/dezosanag/16idibH/dufuzunejufofawubowimubu.pdfIn PDF document text
    • https://marevesebogu.weebly.com/uploads/1/3/0/8/130813877/wedumapafe_wokafu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://42190e62-4dca-482d-a077-ae7b222d7779.filesusr.com/ugd/b91392_afb4eb2c9a3f4e6196cd21dd58980836.pdf?index=trueIn PDF document text
    • http://mevonaku.rf.gd/mock_exam_2018_answer.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/rexube.pdfIn PDF document text
    • http://jimeroxivekafos.epizy.com/25557956010.pdfIn PDF document text
    • http://wadoromutisagar.myartsonline.com/azitromicina_eurofarma_bula.pdfIn PDF document text
    • http://xarozitapakegur.epizy.com/hermes_oran_sandal_size_guide.pdfIn PDF document text
    • http://tomafidom.rf.gd/do_rhetorical_analysis_have_titles.pdfIn PDF document text
    • https://78ff948a-0765-49f5-a22c-0fbe0eba7848.filesusr.com/ugd/888d0b_32e56c2ab61344d3af6539319f348e49.pdf?index=trueIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/bakap.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_off0014c9e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14C9E8 5416 bytes
SHA-256: 697e07aed377417c8ed6d5b68bf28cf43784a3cdfc5fcc0945de56ebfa86ae72
font_01_sfnt_off0014dc5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14DC5A 13332 bytes
SHA-256: 81fe4b82193dba967f9dfeb42346099adda27c8adafef15076793e75aa473b18

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