Malicious PDF — malware analysis report

Static analysis result for SHA-256 06dd3e29cb2f0e2a…

MALICIOUS

PDF

85.4 KB Created: 2021-06-27 19:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bafb4e58ecae6060220ace0243fbfacf SHA-1: ab788e47235e7df8cd72cc1e591943fe9ebad061 SHA-256: 06dd3e29cb2f0e2a6530491ef2b508541ee83d60a1805d5bd2f5bd2f474d8efa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories, suggesting an attempt to redirect users to malicious content. While no scripts were explicitly extracted, the nature of the PDF and the presence of numerous external links indicate a likely intent to facilitate phishing or malware delivery.

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
  • 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 http://toshiteriyakiburien.com/uploads/files/4247733947.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c54e1d57f---686869045.pdf
    • https://condominiovillage.com/userfiles/file/kivinotowun.pdf
    • http://tangiahoang.com/skinkorea/Images_upload/files/80556222869.pdf
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a368115cc00---71780487633.pdf
    • http://eastmoorclassof1970.com/clients/4/43/4343e427eb1b0a0668350338a4d6b623/File/tebobixokewuvigalegalu.pdf
    • https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c3243dcc0---12950603320.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/9cabfe16c8b9ca9836135eb2e254365c/ribizikukisaro.pdf
    • https://cleaner.pl/userfiles/file/pujirasafuxatiritibik.pdf
    • http://magogaralbamoble.com/galeria/files/zunekepinomirered.pdf
    • https://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/4uc9v2ft7l7blshsusa1njhue2/sadizuloralad.pdf
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/60082dcfa50fa6e8f4184a8da25af8b0/gejebenunaxetewatisekuz.pdf
    • http://animationcoach.com/userfiles/file/dukozumamiviridid.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609eea2939e07---ledumodopikosefedural.pdf
    • http://robertfeinberglaw.com/images/edit_images/file/dofuvudakinirafi.pdf
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/c3a0cbef92149f2cef2c0517fb84746d/fasisepexoxumasomugaro.pdf
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098558b90dd6---gaxalalife.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6kiglbp4vaeiju3aqqn3bbou2q/nalunegurojumovukasaw.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b00ec1cd00---51962643469.pdf
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/m90rsu4ip6h3v5hug4t4ulp328/fosoviguviwotutajideranir.pdf
    • http://innospectrum.eu/hirlevel/file/guviloxewawakifupamakumo.pdf
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091637f76771---79634509595.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160872b94f2304---wepafivutofugob.pdf
    • http://ac-kenigsberg.ru/files/file/pixuju.pdf
    • https://too.kg/wp-content/plugins/super-forms/uploads/php/files/165a809223fc63e02b80f2adaf275ea7/koxilejunuresizazeni.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=to+come+to+terms+with+synonym
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0c8.bin
c37eb682550108e3815a6e77b5a9aed010fb8ed5ee453a8539d5a8cd64504a66
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C8 15524 bytes
font_01_sfnt_off0001189c.bin
c3975ca8a0cdca1d1c2c52d2876cfc58ce4b456a5e1a084d93317cc96d0b4a90
pdf-font-stream PDF embedded font (sfnt) at offset 0x1189C 10448 bytes
font_02_sfnt_off0001303b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1303B 16792 bytes