Malicious PDF — malware analysis report

Static analysis result for SHA-256 058de6ecb41e4635…

MALICIOUS

PDF

68.9 KB Created: 2021-09-30 15:45:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 2accf1b1ad8621ecd3df5d6876590a58 SHA-1: 20341466dbbab226e3d837df35643ed1568187ea SHA-256: 058de6ecb41e4635aad02ef80e5e068daf74db63901728b2f7494ae82e206d0c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which are identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://irlanc.ru/uplcv?utm_term=connect+mobile+to+mi+tv PDF link annotation
    • https://softnettechno.com/sribati/editor/uploadfiles/96973731875.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c84d3dd77b---8075956361.pdfIn PDF document text
    • https://ifbscalidad.eus/files/galeria/files/11864913608.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/fiseneriluzanivisab.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/mifogotaboxab.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/kipivodezulukulikaziko.pdfIn PDF document text
    • http://rayhovietnam.vn/upload/files/gerapisamozuzaligoj.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/58133214290.pdfIn PDF document text
    • https://businessincasey.com.au/application/third_party/ckfinder/userfiles/files/buware.pdfIn PDF document text
    • http://liceoadultos.juniorcollege.cl/userfiles/files/naxumajexaboxanipogexidin.pdfIn PDF document text
    • https://birudongker.com/contents/files/kegeronotezinuketapi.pdfIn PDF document text
    • http://eaas-journal.org/survey/userfiles/files/36099267365.pdfIn PDF document text
    • https://kstraders.com/userfiles/file/ximibozazuf.pdfIn PDF document text
    • https://pixel.bg/img/file/58406721802.pdfIn PDF document text
    • https://sarenpinler.com/calisma2/files/uploads/53270895010.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16141bc07515fc---38017167307.pdfIn PDF document text
    • http://imosa.asia/uploads/files/202109180644391849.pdfIn PDF document text
    • http://abbaorphancare.org/survey/userfiles/files/vifobudizasoveketuxenop.pdfIn PDF document text
    • http://tahyuh.com/uploads/files/202109172358504593.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/diditutisumukezugux.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/73205351811.pdfIn PDF document text
    • http://maschimaurizio.it/userfiles/files/vipamamogifakupufejexi.pdfIn PDF document text
    • https://samowar.me/upload/file/bowuligebivijurajedaweru.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/55247966664.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://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_off0000afdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFDC 10196 bytes
SHA-256: 895399bafedf873ab69cf3eebb3e1ad9007e80573dffa01c66508aabde33400a
font_01_sfnt_off0000c6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC7 15428 bytes
SHA-256: 07d0736e3388ee941a586ca82599d9e5072c994a17335a436baa0d96e3498296