Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0505b0544b322ea…

MALICIOUS

PDF

67.4 KB Created: 2020-12-22 09:22:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 43486cc3ed2b7ca55a306526264ba8ad SHA-1: c081e830563f4ce6ef809527c1088ee205486fa1 SHA-256: e0505b0544b322ea5e528e0816164d40eb64c0dfec8826da32e8b8fe4e50f219
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic, with one prominent URL pointing to 'traffset.ru'. This suggests an attempt to manipulate search engine results or direct users to malicious content. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=minute+challenge+card+game PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377114/normal_5fe0ea570f8e6.pdfIn PDF document text
    • https://purusoze.weebly.com/uploads/1/3/4/4/134495244/8463832.pdfIn PDF document text
    • https://geregilewupune.weebly.com/uploads/1/3/4/8/134849809/pojerewarigugo.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/bugutaj/nervio_ciatico_causas_sintomas_y_tratamiento.pdfIn PDF document text
    • https://s3.amazonaws.com/rujimidujek/tv_guide_perth_wa_saturday.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fe011a24a91423ea727098a/t/5fe0d39a3629871941f4b13f/1608569755358/catering_chef_vector_free.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd486d1091525336533171/t/5fde47240f6c913d44eaad1a/1608402724531/mapa_ciudad_bruselas.pdfIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/flight_of_the_bumblebee_trumpet_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/earth_science_latitude_and_longitude_lab_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/answer_love_myself_lyrics_bts.pdfIn PDF document text
    • https://s3.amazonaws.com/mokamoba/povorefewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8d9db6c-f3f4-42ff-92ee-a2eb9fa4a932/kobagoxorodufuxijuxovof.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_off0000ccf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCF9 5180 bytes
SHA-256: 00667080266742a86bd0359c75535ef45639ac82192d23b1327ad505833c03da
font_01_sfnt_off0000de76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE76 10220 bytes
SHA-256: 6b87c1a82fd18ee0ddaa6645cfdb1349a4c3e72868afc91395ef4bd37f7b968d

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