Malicious PDF — malware analysis report

Static analysis result for SHA-256 87a4641da9cdc795…

MALICIOUS

PDF

70.3 KB Created: 2020-12-19 09:54:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 0d79ff3096dad3e693bf7ccc7adac462 SHA-1: 77591e7ef446a695c4a25374a654cb6f42e10cb7 SHA-256: 87a4641da9cdc7957acdaa83057371b67ae261b889534d5a1460ad4a8186694d
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to 'trafftec.ru', suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a phishing lure, likely intended to direct the user to a malicious website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafftec.ru/123?utm_term=alberto+mexican+food+nutritional+information PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367680/normal_5fa76b2a6748e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5fd67579b19c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379369/normal_5f9af9e8d50dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412894/normal_5f9ef8f57b17b.pdfIn PDF document text
    • https://kaxesudinebeg.weebly.com/uploads/1/3/1/3/131379803/xemoxepuxiz.pdfIn PDF document text
    • https://vilaferadir.weebly.com/uploads/1/3/4/7/134771168/padifavebedunenurod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475197/normal_5fabc67d35380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5f8d63c281b7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425511/normal_5fa420a58a327.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/bepukuba/canoe_pontoons_homemade.pdfIn PDF document text
    • https://s3.amazonaws.com/vukumesoj/fofitigonama.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce0ecbf32955146e0e8cef/t/5fd753fe313c42342baa5a22/1607947263904/core_java_basics_mcq_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/setomunegano.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd21f7afe2dd55ed9cc0dd/1606230519990/83035813918.pdfIn PDF document text
    • https://s3.amazonaws.com/towutoginadivu/zoxatekiboj.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_off0000d76d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD76D 5184 bytes
SHA-256: 28f7758fe6e11180b7ca327077b03e27e6e1f31f903fa07150b5812a05a75f4a
font_01_sfnt_off0000e8ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FF 10380 bytes
SHA-256: 57b2956d3f6777f8203a35bbc38b378c6cc4e53391db9b6eb9bbbdfaabaf63f5

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