Malicious PDF — malware analysis report

Static analysis result for SHA-256 7051bc74ea6c0c03…

MALICIOUS

PDF

69.4 KB Created: 2020-11-30 12:41:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: b036ef812c277384b03194dd561b7456 SHA-1: 843f4394895828f9f26029921db0a418c886306d SHA-256: 7051bc74ea6c0c03a80e5e1ed409c70c9bc54dd723ecb1164e255eecc0200eb3
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary URLs, 'https://traffnew.ru/aws?utm_term=enlaces+ionicos+covalentes+y+metalicos+pdf', is flagged as suspicious. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffnew.ru/aws?utm_term=enlaces+ionicos+covalentes+y+metalicos+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462980/normal_5fa2b5f8adad2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487625/normal_5fbc3480dfb03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426813/normal_5fc1758177fe3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473642/normal_5fbf3abe83d65.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://baxojozejaxofo.weebly.com/uploads/1/3/4/5/134586757/dofesunap.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380525/normal_5f9236ae367e5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fc332493485235c862f1f3a/1606627914298/laplace_transform_table_proof.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0f6c4e5c7695ca99bf722/t/5fc1b8a561e25426e1787425/1606531237306/worksheet_16_dihybrid_cross_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/trending_nakhra_song_dj.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0fb6b88c99b6d37a78a63/t/5fc1e7b2f81c9a2a0ce6caa3/1606543284532/21452301415.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf54aa9d79364840850716/1606374571923/morpheus_apk_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe24a6e6d49a06bb5ac4ff/1606296743341/62266377400.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B4 5112 bytes
SHA-256: 0ec20998e0a2d0666969f880eaee6e33edb36e4fde2c13452ded6e10fbf8654b
font_01_sfnt_off0000d411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD411 11384 bytes
SHA-256: 27e01fa80d1d7deddf26b4ccc8aa5187aa234a5b6f71960bc63e7ff70fdd17b4
font_02_sfnt_off0000f8e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E9 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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