Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8fd180634f92259…

MALICIOUS

PDF

88.6 KB Created: 2020-11-24 00:09:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ec52884cb61494acd4baca92c9c0ce16 SHA-1: b867b4710b1408fad9ffc3e6282092d6d0ce75ad SHA-256: c8fd180634f92259995a7535c7639ad4a8a97aa0969ad63593af75618e3f1015
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'traffset.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a malicious document designed to redirect users to a potentially harmful website.

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://traffset.ru/strik?utm_term=conservaci%25C3%25B3n+de+alimentos+pdf PDF link annotation
    • https://zevigetadafuwun.weebly.com/uploads/1/3/0/9/130969942/lezesanirapowoj-paforevewesiro-buwasesugivurud.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/377ce72f-329c-4257-9743-103d627ffa2d/monster_girl_encyclopedia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cc90dc4-de68-4ece-98e4-3ea0222f1b69/zanoliriwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9f5a5d-eab8-4c91-b63a-5baedbe6ee9a/download_professional_weather_software_free.pdfIn PDF document text
    • https://s3.amazonaws.com/dudujopixejikug/dizaxajugikogexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02bc1728-fbcb-48b5-be6a-1cbc50f32941/watch_the_lion_king_2019_online_123movies.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/guzogakibepavajazow.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/hanuman_chalisa_in_english_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc1d42fa-c198-4a3e-8f30-9276b78702fc/nubofelozunuwujolojemudo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57271339-0d63-480e-80b5-32dca713b777/45664509637.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af861e25-2391-4c23-87e4-40e6cc5bb680/download_film_bulan_terbelah_dilangi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59acc974-16eb-41d1-b3be-22bf48ccc4ef/98472606893.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_off0001198c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198C 5404 bytes
SHA-256: d83bb6a38673fa9332411e554bf47e704fe74ffa4a5539ee66b3ce9c9cd28f2f
font_01_sfnt_off00012b9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B9E 12316 bytes
SHA-256: 08885325e3f57d38cfb1be92b86edb5645af1763669f9a4fe3061f0ac32485be

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