Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed8796dc41f068e…

MALICIOUS

PDF

79.1 KB Created: 2021-09-09 18:05:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9be361600d923742eafd5dbe476331b7 SHA-1: f2746308277e915dbb3ab12f9d6dad76e6f3b8b4 SHA-256: 8ed8796dc41f068ef4c2732691033972791fd4e16feadabab75034ef36ce8142
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://allytemp.ru/uplcv?utm_term=pes+18+download+for+ppsspp PDF link annotation
    • https://ohcsi.com/ckfinder/userfiles/files/19947119279.pdfIn PDF document text
    • http://sunriverps.com/data/editor/file/kaputidi.pdfIn PDF document text
    • http://hoachathoanggia.com/userfiles/file/goziwine.pdfIn PDF document text
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/1612f53f888489---8315844287.pdfIn PDF document text
    • http://lawfirm.vn/MINH/user_files/file/devolexivuxerudede.pdfIn PDF document text
    • http://lhdrum.com/User_File/UpFile/file/20210908224923_YnVzb3Rpbmlsb3dva2lrYXZpbg==.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/58908552569.pdfIn PDF document text
    • http://rujiahk.com/uploadfiles/file/69153032708.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/vanodekulab.pdfIn PDF document text
    • http://ahjygjg.com/upload_fck/file/2021-9-7/20210907070601671453.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/gopakipajomixijakiw.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/de89ce4526e964f6c2a7b79f7846b0b8/zurobegakexewitizixowi.pdfIn PDF document text
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/varatuveriwa.pdfIn PDF document text
    • https://ferropula.hr/files/tepekopirogiru.pdfIn PDF document text
    • https://network-italia.com/file/nenipoteditikapaxonexar.pdfIn PDF document text
    • https://discovercefalu.com/_data/images/file/lexebozosinuvasamuxaw.pdfIn PDF document text
    • http://belly.bpv.su/content/files/files/42006847161.pdfIn PDF document text
    • http://zkmeiqi.com/admin/ckfinder/upfile/files/bugelimuregusomogenu.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/kidodape.pdfIn PDF document text
    • http://yesilderecine.com/admin/editor_resim/file/xivaniza.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/bazikanarinupazusevubobe.pdfIn PDF document text
    • https://clinicscrm.com/img/files/3538962271.pdfIn PDF document text
    • http://bienbao.net/uploads/files/69016672830.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_off0000cffb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e812.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE812 10648 bytes
SHA-256: 3dcf9e405835f54c4bcaaff527b1783b42ff1fd1f45a4bfedd5f8b2382127f7f
font_02_sfnt_off000100b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B7 17716 bytes
SHA-256: a9f105e95a80c1306cd4183cb0bcbbefeef3f76932390e5e697f5d28912ab2ec

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