Malicious PDF — malware analysis report

Static analysis result for SHA-256 0465d118112b49d7…

MALICIOUS

PDF

81.9 KB Created: 2021-09-13 04:58:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d824bbac8e1ae9a7223d997d604599c2 SHA-1: 9f3de412b99c67b27731a7378f63c05dfda9c1b6 SHA-256: 0465d118112b49d72bdb243c282e5adf840de8abb361f93bff6836f74a3d5a1d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=android+tool+for+pc PDF link annotation
    • http://birnagarcollege.in/userfiles/file/lalafivafosu.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130b38b819d1---95319547884.pdfIn PDF document text
    • https://dmshospital.com/mm_engg/files/87061115016.pdfIn PDF document text
    • http://cornucopiafrederick.com/uploads/files/lalozawidowiwaketat.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/fererali.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/66800817239.pdfIn PDF document text
    • http://xn--42-jlclgg6a3e.xn--p1ai/userfiles/file/miworoxa.pdfIn PDF document text
    • http://owv-sad.de/userfiles/files/gokunosowebanedeko.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///timeraj.pdfIn PDF document text
    • http://retailpark.bg/uploads/wysiwyg/files/94145396135.pdfIn PDF document text
    • http://fskyok.com/uploadfile/files/molibopulosofejot.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/8718532135.pdfIn PDF document text
    • http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/0ff8aafbe42ba4a0657fe3f55a073445/vuwani.pdfIn PDF document text
    • https://pianotuningdarwin.com/userfiles/files/tikafofasejefakujubu.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/86765392416.pdfIn PDF document text
    • http://domainecomps.com/documents/files/70824505954.pdfIn PDF document text
    • http://cheapmarkt.com/userfiles/file/61998384847.pdfIn PDF document text
    • http://quimis.net/js/ckfinder/userfiles/files/73170246841.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/rotukov.pdfIn PDF document text
    • http://clearspace-design.com/CKEdit/upload/files/11432965144.pdfIn PDF document text
    • https://www.karelo.com/uploads/File/ruxuzopile.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/pemidoligukavuwejigo.pdfIn PDF document text
    • http://matsonconstruction.net/userfiles/file/digekidilizurizejimam.pdfIn PDF document text
    • http://www.sudaff.com/pics/file/52224087799.pdfIn PDF document text
    • http://factorycontrolprojects.com/userfiles/file/67506410725.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_off0000dcf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50E 10132 bytes
SHA-256: 630813d47f6f7f00d160569e4d2a79c5b4beac148920085310ab9ba1430db55b
font_02_sfnt_off00010bb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BB0 17960 bytes
SHA-256: cee8976a104f40c470fd8a0df431b88e74dc432b28f7f4c5ae5941a79f722daa

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