Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec56ab94f360c967…

MALICIOUS

PDF

67.8 KB Created: 2021-05-21 17:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: f76bc4dc62b3d4f408c13afe6a30ca48 SHA-1: def4093dd06df6ee6cea5b9f7f82288b3ba1d059 SHA-256: ec56ab94f360c9678b106b84efef23aa76f00a39041043cc409e625bc6d94844
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 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=dgs+temel+kavram+test PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4483839/normal_5ff546227b0da.pdfIn PDF document text
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/330d81dbbdeb0e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416806/normal_6012cfad9da36.pdfIn PDF document text
    • https://zabaparadasikid.weebly.com/uploads/1/3/4/3/134317604/tajuxosotagaz.pdfIn PDF document text
    • https://mojivuza.weebly.com/uploads/1/3/0/7/130775228/vatifi_lanomog_tuzemafen.pdfIn PDF document text
    • https://redorofi.weebly.com/uploads/1/3/5/3/135383823/4809127.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/gofinopodazuwibutoso.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410020/normal_5fe532385b847.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/nawuvud/ortho_analyzer_software.pdfIn PDF document text
    • https://s3.amazonaws.com/lovetijif/arris_sbg6782-ac_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/18058411359.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13c9bb9f-a8fe-424b-9eb4-e202f2b948d6/traductor_de_espaol_al_ingles_britanico.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79929684-fbd2-488d-8a47-3c80c242e921/the_secret_history_of_the_mongols_purpose.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a65fceb-3f65-43dc-8196-aa5696747893/9066084416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b89bb941-c466-4b96-ba80-5d9b981b3763/boards_and_beyond_coupon_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/26396452080.pdfIn PDF document text
    • https://s3.amazonaws.com/lizuseguwix/materialize_css_layout_template.pdfIn PDF document text
    • https://s3.amazonaws.com/gizonukorad/aa_allen_books_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/82291939668.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_off0000c965.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC965 5128 bytes
SHA-256: c4980e61b7a15fda3fe14ec3a721c27c5b7ed9d43da595badba3e1cec3a04282
font_01_sfnt_off0000dad0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 12004 bytes
SHA-256: 2b736cc9c55a254fc78cd26391ed0462877d29d10aec0398618fe1d1a8e362f2

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