Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca29260dcb7cc1af…

MALICIOUS

PDF

74.2 KB Created: 2021-03-17 17:39:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a4bc093d3e6e8250c5fc8ab3387eefe4 SHA-1: 4420e79b750876878c25c3c2f324bea90f7934f4 SHA-256: ca29260dcb7cc1af6b1d25e175cd6b87a561d0f92590d925bcce615d4ee5375b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://vilenefex.ru/123?utm_term=software+reliability+definition+pdf PDF link annotation
    • http://jaxopofo.22web.org/ikea_catalogue_cuisine_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373008/normal_60155a2c375d2.pdfIn PDF document text
    • https://lopadedabebaf.weebly.com/uploads/1/3/4/8/134897987/jifusekekobi.pdfIn PDF document text
    • https://vibusipapomokij.weebly.com/uploads/1/3/2/6/132682711/5253244.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379500/normal_602073c7891e4.pdfIn PDF document text
    • https://rubexanow.weebly.com/uploads/1/3/5/3/135346757/8648077.pdfIn PDF document text
    • https://zukodefikarux.weebly.com/uploads/1/3/4/4/134498552/a23a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_60245b23c99e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464539/normal_5ffc48036fa04.pdfIn PDF document text
    • https://joziwofu.weebly.com/uploads/1/3/4/0/134012586/1964689.pdfIn PDF document text
    • https://tidukefawa.weebly.com/uploads/1/3/4/8/134851120/vubugedunigukajoba.pdfIn PDF document text
    • https://pamuguvijokogag.weebly.com/uploads/1/3/4/8/134883264/ebeae.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/wuxupewu/69537949358.pdfIn PDF document text
    • https://s3.amazonaws.com/xapota/kiduvasiwakenoze.pdfIn PDF document text
    • https://s3.amazonaws.com/sifawekujiki/85394274198.pdfIn PDF document text
    • https://s3.amazonaws.com/kuxuxemu/48722890039.pdfIn PDF document text
    • http://xagexof.rf.gd/welexelarevofewefafusaze.pdfIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/how_to_reset_the_ribbon_in_autocad.pdfIn PDF document text
    • http://saninov.epizy.com/que_es_capex_y_opex.pdfIn PDF document text
    • http://vonikolodu.rf.gd/broadcom_driver_windows_10.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/56138898726.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/71101469836.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/application_form_example.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_off0000e40c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40C 5292 bytes
SHA-256: 1bc75be744dd3960f4a1101cbd1aaf05a762e93d548e41d7c95ecd75aa85cd86
font_01_sfnt_off0000f632.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF632 10820 bytes
SHA-256: d5a6ebf0165be182345b2792ed4578d358be8925674bc91810c58b81fe9acd26

Open this report in the interactive analyzer, or submit your own file for analysis.