Malicious PDF — malware analysis report

Static analysis result for SHA-256 06b37b94f4ef40fe…

MALICIOUS

PDF

82.1 KB Created: 2021-09-19 10:59:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b1547d8f7064aba22e653aa2f21d5133 SHA-1: 8f9e94f6f27ba93acef9885f26e5708dd59ac962 SHA-256: 06b37b94f4ef40feb6c6cc8efcd638db08863032dbf15487a08eee3a9a614feb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm for phishing or malware distribution. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • 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.
  • 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://laborke.ru/uplcv?utm_term=antropologia+de+la+pobreza+oscar+lewis+pdf PDF link annotation
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd85286b5e---garetejuruvofadafat.pdfIn PDF document text
    • https://uzunlarpeynir.com/dursun/upload/files/84572890004.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/sgdau5vhuc15rolt8ipfgfv9v2/92296997885.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/0755ae4b4ed58bd93b894e1357fcb26e/dolesunanutan.pdfIn PDF document text
    • http://iccj.jp/images/uploads/fckeditor/file/12455764828.pdfIn PDF document text
    • http://gachmenminhchien.com/media/ftp/file/98644119940.pdfIn PDF document text
    • http://jeansresource.com/js/ckfinder/userfiles/files/jefazit.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/tufasuzadi.pdfIn PDF document text
    • http://topoint.net/userfiles/fckFile/20210912054748.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/zolunuxugapagid.pdfIn PDF document text
    • http://www.vljainandco.com/userfiles/files/zojodiji.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161347b5e46255---romol.pdfIn PDF document text
    • http://baoveantam.info/upload/files/9360233078.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/92685433472.pdfIn PDF document text
    • https://socardan.com/userfiles/files/62860876762.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/37190c151d3f3b967ef7eb245f5eaed7/safovudabujefobo.pdfIn PDF document text
    • http://www.leads-bd.org/app/webroot/js/ckfinder/userfiles/files/46411265013.pdfIn PDF document text
    • http://tuttotop.com/userfiles/files/viwogodujajoja.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/298caaa1e9d211b673fcd8b2a6d7de2b/kizodoxikubotu.pdfIn PDF document text
    • http://shipagents.nl/uploadfiles/file/89130629703.pdfIn PDF document text
    • https://ceccarbotosani.ro/userfiles/file/58699396351.pdfIn PDF document text
    • http://baiduvpn.com/upload/files/49010525748.pdfIn PDF document text
    • http://xn--80aejmo0alc.xn--p1ai/ckfinder/userfiles/files/jobax.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/piwigizuladuxubukenav.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_off0000d5a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5A2 11064 bytes
SHA-256: 63e697ac8e548d69fdf55c4207788319378ebffe0ceb7efa4e38bc61ffecd783
font_01_sfnt_off0000ef3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3A 19568 bytes
SHA-256: 4a1b0e9814719c425130ec1f123e3909e7d1a85d9d826db717b2dc096d38c865
font_02_sfnt_off00012107.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12107 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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