Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6ebc1c0dffd7024…

MALICIOUS

PDF

111.8 KB Created: 2021-06-23 00:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 62345bcb59b99ad162f5425389c30c09 SHA-1: 9a702cd35fc47b067e5c0875d7eef8c653cb3ae8 SHA-256: d6ebc1c0dffd7024052c74a942d359e4c59f5bd2fb398c7605395fe10410a996
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous links to potentially compromised websites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically classified as phishing and trojan activity. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing lure disguised as academic material.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/63f298c14a0c853ef8dcd8a174904e46/jabupevazo.pdf In PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/vujunuvedesonunefamun.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071f5c13e6ae---88823839158.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160859cbb9d948---rewojevurep.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/k4kc2phu5o7nau5n45mnkclki1/43844147647.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b24142a046---96581029559.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2170825f7---7521024907.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608609e167a5c---pozamuseki.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1609ac2e0e37c6---95095232577.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/73056082890.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/xemiriful.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios//files/3437735502.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607290f85f0d1---muwukeguxuraj.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/tefakiwan.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a16d14e0b17---figizodujisub.pdfIn PDF document text
    • http://domeinbeverdonk.be/assets/files/file/tupubapuvepavewasez.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/42269408407.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=neoplatonic+philosophy+introductory+readings+pdfPDF link annotation
    • 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://scripts.sil.org/OFLIn 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_off000161c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161C0 5488 bytes
SHA-256: 347868e1e6def965ce5a63d2e7cddc77b4289065e7eb5448f6651e38f1527c59
font_01_sfnt_off00017471.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17471 11524 bytes
SHA-256: 7420949d4c8eab189dce32395be6aaa5be644938d0ebadd4b5405516197bea1c
font_02_sfnt_off00019bcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19BCB 16232 bytes
SHA-256: 97dfd5019501f23c63d119256cc9411ccc51cdc9e98ab6c60b5cbde597b43a1e

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