Malicious PDF — malware analysis report

Static analysis result for SHA-256 7628725f3e5bdda5…

MALICIOUS

PDF

92.4 KB Created: 2021-03-09 02:12:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 85e6a085e037f5d73ccfcf5cf7426b60 SHA-1: c85b5b47916efcdd476d2e0f76c6420f709531d8 SHA-256: 7628725f3e5bdda5c8da9366c551543886c09e24e21a9a239adfc71ff405ff47
136 Risk Score

Malware Insights

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

The PDF document contains a heuristic indicating it is a password-protected archive lure, suggesting it is designed to trick users into downloading a password-protected file. The presence of external URIs, including one pointing to 'mezovuduw.ru', further supports the malicious intent. While no scripts were explicitly extracted, the ML classifier and ClamAV detection strongly indicate malicious behavior, likely involving the download of a secondary payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://mezovuduw.ru/strik?utm_term=what+are+the+color+codes+on+a+resistor PDF link annotation
    • http://netogisinof.iblogger.org/lemomaleriwege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489733/normal_5fdcb9afbdfa0.pdfIn PDF document text
    • http://sewawena.scienceontheweb.net/lg_refrigerator_service_centre_in_mehsana.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/rheem_hot_water_heater_installation.pdfIn PDF document text
    • http://tugrull.com/lidisarokidajobiq7q9h.pdfIn PDF document text
    • http://golesaluwo.66ghz.com/bengali_album_song_video_hd.pdfIn PDF document text
    • http://idslim-italia.site/8284777196389qve.pdfIn PDF document text
    • http://copyright-services-us.com/the_essential_rumi_coleman_barks_review6646n.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500668/normal_5fe733296674e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381751/normal_601af4aa360cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bixikaw.epizy.com/bikeman_performance_rzr_900.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/guregudagogine.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/97725769982.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/adidas_size_guide_football_shirt.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/cal_mol_to_kj_mol_converter.pdfIn PDF document text
    • http://lawakeweba.epizy.com/41562568327.pdfIn PDF document text
    • http://jujonejetas.epizy.com/business_plan_sample_kenya.pdfIn PDF document text
    • https://s3.amazonaws.com/pazerogasarinu/rapuruvejisijozukefe.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/21862167765.pdfIn PDF document text
    • http://nejarisiwudu.atwebpages.com/7544515840.pdfIn PDF document text
    • https://s3.amazonaws.com/papuja/aws_s3_client_file.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/kinnickinnic_river_fly_fishing_report.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_off00012bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BCB 5040 bytes
SHA-256: bd2b8e46c0a9a66082c07aa10918d2cd68d917f686583f33d544adf726de1684
font_01_sfnt_off00013cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEE 11488 bytes
SHA-256: f77c4bfaadb4faca2b8c257a5599e9d7a2a2eee3cf8889766cc89df0b66021d8

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