Malicious PDF — malware analysis report

Static analysis result for SHA-256 97f0d0347f4de9d5…

MALICIOUS

PDF

81.4 KB Created: 2021-09-17 14:41:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4c73f5a2335fb9a5c9b5bf8171abc2ab SHA-1: 81c189896c91e6d4fe9ed035b5ab998a37ddfd92 SHA-256: 97f0d0347f4de9d5e973eca0c5d5cf9c5c30ba2945c58aac5089126ddfc7e3e8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan variant. It contains numerous embedded URLs pointing to external domains, indicating a likely intent to redirect users to malicious websites. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm setup, common in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://ketchas.ru/uplcv?utm_term=indigenous+art+symbols+meanings PDF link annotation
    • http://lamay.de/userfiles/file/gikadixune.pdfIn PDF document text
    • https://spbmworld.com/anaeter_capital/siteadmin/userfiles/files/xamozobaxavodime.pdfIn PDF document text
    • http://massimosusto.eu/userfiles/files/54050816453.pdfIn PDF document text
    • https://aneri12.cz/res/file/76392583064.pdfIn PDF document text
    • http://chip-chup.hu/upload/file/rokagufepulazasavituvokok.pdfIn PDF document text
    • https://aneri12.cz/res/file/93874795733.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/92426735579.pdfIn PDF document text
    • https://encoyun.com/calisma2/files/uploads/xidemeronobugisaxe.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/gilotuvikenaluzukotuva.pdfIn PDF document text
    • http://isspskola.lv/userfiles/files/xuzipupo.pdfIn PDF document text
    • https://lrsinc.co/userfiles/file/5509496869.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/bcb6b471018ba31c1cbc8c652008482e/zowililejoxaralo.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/nubuluvawakumimaninera.pdfIn PDF document text
    • https://spacio.hk/attachment/file/sowonaluvibi.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/72b75b09fca471787658188a1dcd4f14/linapopilu.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/vedimapibulebetagugibig.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/poveramesiwubajar.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/wuxorakeras.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/13805181205.pdfIn PDF document text
    • https://flomogroup.com/upload/files/2921869858.pdfIn PDF document text
    • https://perfecthospital.net/FCKeditor/file/vetelusupuseturipeduzuzu.pdfIn PDF document text
    • http://alteredcompta.com/buddha/ckfinder/userfiles/files/10160681363.pdfIn PDF document text
    • https://sinarlangit1.com/contents/files/fapatodep.pdfIn PDF document text
    • https://sayurhijau.com/contents/files/sifaguwisotezemawokewojob.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_off0000d933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD933 10896 bytes
SHA-256: 6dae50de0b10ec49dbadc5122531a76a4308c4c669cf43df45f1e11ed79f80fa
font_01_sfnt_off0000f234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF234 17648 bytes
SHA-256: f102e6ee548e199c2f6c3790cdd2c755906fd40c309f77ffc3d05009b877cfbf
font_02_sfnt_off00011fbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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