Malicious PDF — malware analysis report

Static analysis result for SHA-256 29a3d024d64d2479…

MALICIOUS

PDF

136.9 KB Created: 2021-05-25 09:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ae331b74af571600898beb08387db58a SHA-1: e2e5cbfe03f4dd586dfe6e6e7f43f7306530ed59 SHA-256: 29a3d024d64d2479c382ee609284542d112fd560ddad0c55c16f2b248992d686
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains an embedded URL that likely leads to a malicious site, suggesting a spearphishing attachment attack vector. Although no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of malicious intent to redirect users to a harmful resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://druttle.ru/strik?utm_term=fetal+weight+percentile+chart+by+week+canada PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4447877/normal_5fe2977bad5f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_60461ee6b60d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464542/normal_602c49bc942d2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459176/normal_5fe4e2e7633b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407081/normal_60349f599e0c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393763/normal_601fa95fb69a0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494889/normal_60644c20aedd7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391335/normal_5fed74ec5e5b0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450354/normal_5fd85e01bdb1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481834/normal_602b55ba67256.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368999/normal_60309814f09d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5b7ad9d-4d15-4ad3-8e4b-d5d7b008fe95/wulozoxelawobek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05c38374-aab9-46f4-8d9e-becbf7755a01/english_grammar_workbook_grade_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f17685d-8c8a-4aea-83fd-87e011662ff7/solajamisezegukatuju.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/cd_dvd_format_software.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba385cb0-bf20-4ab7-b906-32fe5e8ab23f/47692087309.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/79232391747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a82e071-9b62-4d8a-82f1-fb6a63bc93ec/que_es_el_canal_en_los_elementos_de_la_comunicacion.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/sss_triangle_construction_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d4bb797-1858-4f75-8ffe-1d4d085d68d4/3996163234.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_off0001d9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D9AF 5512 bytes
SHA-256: c162ccde9ac93bc5520a1f626418a73fb64d149254e9fd1cff9bacb79f44f4dd
font_01_sfnt_off0001ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EC80 12804 bytes
SHA-256: f3587ee82a304dbffefb70432448673d8c2ae078376c6e5e92ce9e738d81588a

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