Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b80350f7e7d972…

MALICIOUS

PDF

69.1 KB Created: 2021-03-19 06:13:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 5cc1d2efc1dee7d6bad220e9745e9423 SHA-1: ac6a5f70ae5f6fa0c5e39dcdc83759a3f108ece0 SHA-256: f7b80350f7e7d972fc9e6c3757b948a7ed19a793124372169877a6504a502b16
126 Risk Score

Malware Insights

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

This PDF document was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan distribution attempt. It contains numerous embedded URLs, with a primary suspicious URL being https://mezovuduw.ru/award?keyword=angularjs+tutorials+point+pdf+download, which is likely used to redirect the user to a malicious site. The document's structure and numerous links suggest it functions as a link farm designed to obfuscate the final malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://mezovuduw.ru/award?keyword=angularjs+tutorials+point+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480899/normal_6033b9dd02908.pdfIn PDF document text
    • http://wofeboz.66ghz.com/kevivop.pdfIn PDF document text
    • http://mimivudarevi.scienceontheweb.net/oxford_academic_vocabulary_practice_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404741/normal_5fee39cb4ec05.pdfIn PDF document text
    • http://wovuwukotuvoxi.mygamesonline.org/59888132206.pdfIn PDF document text
    • http://durebemidiges.getenjoyment.net/amar_chitra_katha_books_set.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462351/normal_5ffffdaf50e29.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488103/normal_5fc734c06a17b.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/swot_analysis_blank_template_worksheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465136/normal_5fe9635498311.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369185/normal_60135c1b3de87.pdfIn PDF document text
    • http://leledup.mypressonline.com/is_wendys_breakfast_sausage_pork_or_beef.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461767/normal_600533c71e287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450870/normal_6019d6cd0d9c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_602720fd7c150.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368781/normal_6049788b20c2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447096/normal_60413305022f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378599/normal_60407ebfb8318.pdfIn PDF document text
    • http://vasakuso.sportsontheweb.net/definite_and_indefinite_articles_in_french_exercises.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tixixomevupot.rf.gd/53960299523.pdfIn PDF document text
    • http://nojikigor.myartsonline.com/kubigofamutotilugopuji.pdfIn PDF document text
    • http://kopunumepoz.rf.gd/39049670209.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_off0000d20a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD20A 5368 bytes
SHA-256: 8a428a7acc695243bf67f2b8f19fac9cfaced50e66e8abd59719f51256aa396b
font_01_sfnt_off0000e477.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE477 10224 bytes
SHA-256: 39af3dd916cf8cb2368edbbf3705db2ca45d3226db73531f650d2e5cdfd38085

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