Malicious PDF — malware analysis report

Static analysis result for SHA-256 67ba0ed7ee94a7d3…

MALICIOUS

PDF

76.2 KB Created: 2021-09-24 12:56:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c01965882bc536e943c25fd04d1bc295 SHA-1: 99898f9db26cfd5f26b2ee7b426efadf54bdc23b SHA-256: 67ba0ed7ee94a7d39215b598c7396211708b80fe81357f8fa58fe1e63fa3bd65
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external links, many pointing to compromised WordPress sites, suggesting it functions as a link farm to distribute malicious content or phish users. The presence of embedded URLs and the overall structure point towards a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://wastran.ru/uplcv?utm_term=mission+impossible+ringtones+for+android PDF link annotation
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136360d36100---kiveji.pdfIn PDF document text
    • http://lisaarkinlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/farovubof.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131d532b5f6d---70627188860.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/75692652939.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16145c4f72197e---jusoxaxowaxel.pdfIn PDF document text
    • http://xinge168.com/uploads/files/20210916020612_343740.pdfIn PDF document text
    • http://zenithmetals.com/files/xopugafewazexitomi.pdfIn PDF document text
    • https://pharmnet.cz/ckfiles/files/files/21930349556.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/xefelexoxavukuju.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/71810816291.pdfIn PDF document text
    • http://ergakiland.ru/files/files/xiduse.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/68016830836.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/linogibisimejoxesosiku.pdfIn PDF document text
    • http://guchen.ru/d/files/99266169289.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c20898a687---mawegivovoxenaludepusiwof.pdfIn PDF document text
    • http://yeditepegumruk.com/userfiles/96205797940.pdfIn PDF document text
    • http://calisnt.com/uploads/files/xetemujazibinokifokavo.pdfIn PDF document text
    • https://avigailpekelman.com/sites/default/files/file/dipesapodasaguto.pdfIn PDF document text
    • http://tsnpharma.com/upload/files/tivumavoka.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/15732688029.pdfIn PDF document text
    • http://houstontca.org/Content/uploads/files/73937875935.pdfIn PDF document text
    • http://2016.letnifestiwal.pl/ckfinder/userfiles/files/fapuxuwunelelavivov.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/161403886a0967---pilulukobafunazevosel.pdfIn PDF document text
    • http://vina2002.com/uploads/files/duripoba.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_off0000be09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE09 10976 bytes
SHA-256: 1f7acb4ba56120b25d2a358c2a8bc645e2ac9ce797644e6acec941548c8725bb
font_01_sfnt_off0000d709.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD709 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ef1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF1B 19396 bytes
SHA-256: f93c78f189b2e48009c2a2e01a133be993969daa33721455045794b85278797c

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