Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5bd6f536e219649…

MALICIOUS

PDF

75.1 KB Created: 2020-12-02 15:02:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: cfe807fff0675bc6cc3948c2d1104bee SHA-1: bf99f32e01433109f7073cc3abfd8367e856f5d6 SHA-256: d5bd6f536e21964993b07f589942402ff47e9447bb37467a880ae30e00035b93
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, suggesting it is part of a link farm or phishing campaign. The primary URL, 'https://traffine.ru/aws?utm_term=ielts+writing+task+1+practice+with+answers', is presented as IELTS writing practice material, likely a lure to direct users to a potentially harmful site.

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://traffine.ru/aws?utm_term=ielts+writing+task+1+practice+with+answers PDF link annotation
    • https://xafarapodekil.weebly.com/uploads/1/3/4/3/134369556/1905021.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_5f8db1afb6eb9.pdfIn PDF document text
    • https://fuvipizewovotat.weebly.com/uploads/1/3/1/0/131069886/libetit_werolubadawipu.pdfIn PDF document text
    • https://jixatazibasuv.weebly.com/uploads/1/3/4/4/134402985/4007137.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc0dfe77d0c8f249d40ab54/t/5fc114cc145a8629dcd74a5d/1606489294535/28430267481.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/36347916301.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/fumavuredilaruzev.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe00a5fa04221c71e71c69/1606287525892/spousal_impoverishment_income_allocation_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc111025e8e827d428ec193/t/5fc53ed3cb3e0f5771fac914/1606762197256/santo_rosario_milagroso_corto_lunes.pdfIn PDF document text
    • https://s3.amazonaws.com/zosevid/35532250539.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/62648677545.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc06ef3116eb00e3c49974f/t/5fc1c622e18c5c478e3d6a17/1606534691300/dodge_grand_caravan_gas_mileage.pdfIn PDF document text
    • https://s3.amazonaws.com/sagotomagin/mhw_bow_augment_guide.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

Related samples 7

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C0 5340 bytes
SHA-256: c7759a7f4dd39c4179756273ce65b2980ba51135a5ac4ae1b68d72db0a4f28da
font_01_sfnt_off0000fafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAFE 10792 bytes
SHA-256: a85ef0d22088aa2d63219567a3390a151e6c8ac3e55b0661749877e0deac48cd

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