Malicious PDF — malware analysis report

Static analysis result for SHA-256 10ce7bb3fdc3bdfd…

MALICIOUS

PDF

80.4 KB Created: 2021-03-01 05:22:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 9ded157c29d49b59fa5b9b9e19fa22f7 SHA-1: 777ed0c65bdbacb39ddedcd5c42365de528846f9 SHA-256: 10ce7bb3fdc3bdfd2969c2d2175170082afa85f63f4f2503c6a6dcc9bf13c53a
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to potentially malicious domains, indicative of a link farm or phishing campaign. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://baarspo.ru/award?keyword=neverwhere+age+rating PDF link annotation
    • http://tertov.xyz/riguvefukadeforimosp2jco.pdfIn PDF document text
    • https://voxonevixes.weebly.com/uploads/1/3/4/3/134383310/milinatimoz.pdfIn PDF document text
    • https://jidedenevunuva.weebly.com/uploads/1/3/4/4/134498736/jupobasunupe.pdfIn PDF document text
    • http://vengriya.space/what_is_lean_startup_managementqpwwz.pdfIn PDF document text
    • http://hermidkovo.info/mapowonawoboxiotarc.pdfIn PDF document text
    • https://dagojamigim.weebly.com/uploads/1/3/4/7/134763314/fofuji.pdfIn PDF document text
    • https://fefokepixax.weebly.com/uploads/1/3/1/4/131452923/8828186.pdfIn PDF document text
    • https://rimofunoduw.weebly.com/uploads/1/3/4/5/134525219/gizufubada.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_603335cb61fe0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475716/normal_5fe7e8b187b35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447914/normal_601840559d674.pdfIn PDF document text
    • http://uspehdnyaaxyz.xyz/ejercicios_resueltos_de_limites_al_infinito_con_radicaleseqi5m.pdfIn PDF document text
    • http://xsafak.com/how_to_create_a_website_using_wordpress_freetw23w.pdfIn PDF document text
    • https://mifugitosa.weebly.com/uploads/1/3/4/6/134631290/vamuxet-fatokavab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/varoximu/cs_1._6_parachute_plugin_free.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/55294920106.pdfIn PDF document text
    • https://s3.amazonaws.com/redegelesibif/96162914583.pdfIn PDF document text
    • http://lofopeba.rf.gd/republic_plato_book_2.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/certified_management_accountant_syllabus.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10054 4860 bytes
SHA-256: 16417b79217b463927f2c91d561a47aad9ee4b32b4885e22e25da8ffe7a9e964
font_01_sfnt_off000110f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F2 10408 bytes
SHA-256: 32fa47b887c1662436f00c2ec729ae680b3ca8028cb9bea0a15adbbde78b7c91

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