Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee46e13cfa168fa6…

MALICIOUS

PDF

77.9 KB Created: 2021-09-12 20:52:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 40d888427822e8bacdb5174569c104dd SHA-1: 590d06d9cb7878da21831249d772a2d99f44ae1a SHA-256: ee46e13cfa168fa6f4cda148221f521c1fd3345c3650d539346930501bf53443
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to suspicious domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm strategy, suggesting the PDF's primary purpose is to redirect users to external sites. While no scripts were explicitly extracted, the PDF structure and URL distribution strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://zapcdn.space/web/img/podborky/files/vowupizebaweganadesiv.pdf In PDF document text
    • http://citadelcaralarms.com/userfiles/file/48370242010.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/tozuvamusoxadisukakefadef.pdfIn PDF document text
    • http://xlpe.net/Images_upload/files/xawulobepazove.pdfIn PDF document text
    • http://zonweringbelgie.eu/ckfinder/userfiles/files/65426492389.pdfIn PDF document text
    • https://jokerprod.net/userfiles/file/jakumafiwomolamarujibana.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/3927473142.pdfIn PDF document text
    • http://bresky.cz/res/file/zosokiv.pdfIn PDF document text
    • https://olterus.info/contents/files/69476684666.pdfIn PDF document text
    • http://orem.mn/uploads/files/90294596493.pdfIn PDF document text
    • http://avtokit116.ru/!upload/files/vekufole.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/a7bnmlfanlvbgscs2qq7i26ma7/kigutaganojozi.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/84779131425.pdfIn PDF document text
    • http://sbnjl.com/userfiles/files/sisomepeka.pdfIn PDF document text
    • http://akgwealthplanner.com/crm/files/8380949923.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/mivanomasefegepa.pdfIn PDF document text
    • http://modulobase.com/userfiles/file/tinesidemusizijato.pdfIn PDF document text
    • http://tuanayapim.com/rsm/files/nosasorejupijirutebetaze.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/mepewi.pdfIn PDF document text
    • https://valergences.fr/userfiles/file/rezux.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/6392251397.pdfIn PDF document text
    • https://lesura.net/userfiles/file/93997856404.pdfIn PDF document text
    • http://uts.edu.co/portal/app/ckfinder/userfiles/files/kisowigowivuwuk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=samsung+app+android+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c5e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5E1 19524 bytes
SHA-256: ef68cc65c8290049ea5b7ad4372c087443f58849f850d022d23a9beb39a181ff
font_01_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 10768 bytes
SHA-256: 9eb978216c4c892fa63356d199c949d9ae729e6ab680f06d8021edf5dcebe90e
font_02_sfnt_off000111cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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