Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1fc455c45820ead…

MALICIOUS

PDF

78.4 KB Created: 2021-01-29 05:02:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e017986b345fd916547ba1042b63a351 SHA-1: 5e7b7f5a3ded0f22950361f6bbec7afdb7011af5 SHA-256: f1fc455c45820ead50e9f69484fa40f5438ac1b41dc412d5489b0484d74b850b
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, identified as a PDF SEO link farm, suggesting a phishing or scam attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a malicious document designed to redirect users to potentially harmful websites.

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://leonvi.ru/aws?utm_term=cobra+lash+leveling+guide PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482215/normal_6001e16191ac6.pdfIn PDF document text
    • http://toselarasomax.iblogger.org/82943032861.pdfIn PDF document text
    • https://kewegiru.weebly.com/uploads/1/3/1/4/131438086/2f44fa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5fccd6eb7b85b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491148/normal_5fe8e6802da46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421937/normal_60136423ef6d6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485935/normal_5fcd38e00f7a5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370533/normal_5fcad6c496a5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_5fe8102236d7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425217/normal_5fffdcf84c4b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475215/normal_5fd82623b93bc.pdfIn PDF document text
    • http://xuvaguwanolinu.66ghz.com/canadian_zip_code_format_regex.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kevusej.epizy.com/perkembangan_dan_klasifikasi_akuntansi_internasional.pdfIn PDF document text
    • https://s3.amazonaws.com/mamukawaxatali/mixokiruwuzotitivew.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/icloud_photos_to_iphone_ios_11.pdfIn PDF document text
    • https://s3.amazonaws.com/bomifabipi/the_global_competitiveness_report_2018_data.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxexi/chess_free_for_windows_10.pdfIn PDF document text
    • http://vobewegogiz.rf.gd/chucky_tamil_dubbed_movie.pdfIn PDF document text
    • http://roxewew.epizy.com/iifa_awards_2017_full_show_720p.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_off0000f3e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E1 5192 bytes
SHA-256: de8d439419bb11b0918eb66128a2da16a54178adb10c7675af38294fa9c3111e
font_01_sfnt_off0001057d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1057D 10936 bytes
SHA-256: 4575899235544daae463eeb94270476b452b41dd989b0cffbbfc36244fde6a33

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