Malicious PDF — malware analysis report

Static analysis result for SHA-256 43534ed121b0146b…

MALICIOUS

PDF

65.9 KB Created: 2020-12-03 00:06:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c976e16b2dbcdceb7d16a585ded95d4d SHA-1: 20226036bebd0d42e054353980d3a92ccf73531e SHA-256: 43534ed121b0146b7887d3a54dcaaabee6d4f8907949a237b3b1b97165e3ec14
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=shark+navigator+lift-away+bagless+upright+vacuum+cleaner+-+nv351+attachments'. This URL is likely used to deliver a malicious payload or conduct phishing. The ML classifier and ClamAV detection further support the malicious nature of this PDF, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://cctraff.ru/strik?utm_term=shark+navigator+lift-away+bagless+upright+vacuum+cleaner+-+nv351+attachments In PDF document text
    • https://cdn-cms.f-static.net/uploads/4490375/normal_5fbd1ce376a26.pdfIn PDF document text
    • https://bekijarodik.weebly.com/uploads/1/3/4/6/134617997/litamagul.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/5fc376cddf132613bbcdefad/t/5fc5f8b03485235c86947648/1606809780862/pawadelur.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db78a5bc066edfc78c8f/t/5fc798926beae454316afd10/1606916242973/ptc_phone_repair_grand_central_toowoomba_city_qld.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27d9f024-5b5f-4999-a471-2e7516bfcc52/algebra_2_honors_syllabus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b3eeb29-1836-4cd1-b9ae-13abdf5153ad/53290228333.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0028ac14dfd36feec75cc/t/5fc515643c6ccf69f3fff286/1606751588721/39413951231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e85cd0b-13c4-4379-abe8-959cfde0d2f0/20636778894.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/partes_de_la_misa_explicada.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_off0000ba58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA58 6360 bytes
SHA-256: e25b3b14f265a8d92a28026bab80c9e372963f7c849be218047dcc6f8cc8b7f4
font_01_sfnt_off0000cffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFE 11988 bytes
SHA-256: db32dd41bece00fe9504636300b4cfdfd2aba9691b73c23672dfa57d3ad15b94

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