Malicious PDF — malware analysis report

Static analysis result for SHA-256 e63bbe46d3a57648…

MALICIOUS

PDF

134.6 KB Created: 2021-04-16 04:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: c90b3b942209df6690eb75afab55846d SHA-1: ce1365f6987c328ad935b823587fb673e2e6d63b SHA-256: e63bbe46d3a576487be75fdaea1e2b88bcc8e0339eeb7a431df859aada4c0461
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains multiple embedded URLs, with the primary one being 'https://resalured.ru/strik?utm_term=basic+dutch+grammar+book+1+answer+key+pdf', suggesting a lure to download further content. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to trick users into downloading payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://resalured.ru/strik?utm_term=basic+dutch+grammar+book+1+answer+key+pdf PDF link annotation
    • http://supozupewurak.22web.org/icao_annex_2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476010/normal_5fed14c5b5bed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485703/normal_6038c393e32d0.pdfIn PDF document text
    • http://topplafond.xyz/autocad_to_converter_free_download_onlines9b0z.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390383/normal_6004a6a7e748d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417032/normal_5fe2a9e77636e.pdfIn PDF document text
    • http://thecabinets.xyz/ccna_1_chapter_3n8d0v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377678/normal_5fde9c08542d1.pdfIn PDF document text
    • http://bottlechainworld.com/stihl_bg55_parts_amazon8rfx9.pdfIn PDF document text
    • http://fezideruxojogo.iblogger.org/animal_farm_character_quotes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503767/normal_5fee3606382c1.pdfIn PDF document text
    • http://instofficial.online/vozijamoragb8gc.pdfIn PDF document text
    • http://pemutoguxo.66ghz.com/jutibegunipo.pdfIn PDF document text
    • http://trenolgia.buzz/percy_jackson_and_the_lightning_thief_movie_charactersvpnqp.pdfIn PDF document text
    • http://carinsusa.com/nuzej2wfby.pdfIn PDF document text
    • http://fbdirect.site/78010560829ap7hy.pdfIn PDF document text
    • http://sexesex.site/zelanuxadavegumedozu3okq.pdfIn PDF document text
    • http://nebo-baikala.ru/combining_like_terms_worksheet_6th_gradeyb4lm.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/nefomojuwet/65925118206.pdfIn PDF document text
    • http://pukojunobewev.rf.gd/28040490069.pdfIn PDF document text
    • https://s3.amazonaws.com/juduk/kelital.pdfIn PDF document text
    • http://moferamobonar.epizy.com/night_portrait_photography_settings_canon.pdfIn PDF document text
    • https://s3.amazonaws.com/miledu/43953855615.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/pefuxoguzawezofonusubu.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_off0001cb43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CB43 6036 bytes
SHA-256: be7d25d39130106afa7c3428f7890e63c291d5b5b2ed64e53060c439220bc419
font_01_sfnt_off0001dfc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFC5 13384 bytes
SHA-256: c0d5c21a086a339a06c330680e912d642dc486bbb08738bc44cd495b1c55c209

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