Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a39da009e915e52…

MALICIOUS

PDF

71.3 KB Created: 2020-11-23 19:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d0c5ef685f8a929825ae393b77efea8b SHA-1: bcd247b58ae657690c37e344fae406c53d3d68cf SHA-256: 0a39da009e915e5206ef30cca0f5331b7cc2e8c82d1a14d96881a79fbef0ccd3
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, appears to be a lure related to 'Bissell deepclean premier pet carpet cleaner instructions'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/123?utm_term=bissell+deepclean+premier+pet+carpet+cleaner+instructions In PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/8a3c955d9b939ee.pdfIn PDF document text
    • https://wubigunes.weebly.com/uploads/1/3/4/5/134507070/7832715.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/1482587.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_5f88531382bdc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500678/normal_5fb03a108eefa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454966/normal_5fabdc591ee8c.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/somisilegex/crystal_reports_runtime_2013.pdfIn PDF document text
    • https://s3.amazonaws.com/gafedupeba/42678276730.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/calendario_futbol_mexicano_apertura_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/fefudazima.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/35720760382.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/79090476770.pdfIn PDF document text
    • https://s3.amazonaws.com/potamotaz/78021730042.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_off0000db03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB03 5268 bytes
SHA-256: fe6b1f8093faa61ab6096cfc3c38435853fbefededdfe2dfa5a91bd3f1243a95
font_01_sfnt_off0000ecd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD6 10372 bytes
SHA-256: 0dfceb62c2c054412e21938953eba0b6c5152a7ac1624ed97ac7e17a77c6eb34

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