Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d02e49bb2f0b1e4…

MALICIOUS

PDF

70.2 KB Created: 2020-12-28 06:05:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2aef5fd8faf5ffba7938afa658d2f5af SHA-1: 189c3d46274d7eba82f8c8a7388208aae9b9b41b SHA-256: 6d02e49bb2f0b1e429a6582072b641bca2c4b6628f1e56b1b2e10654f3345c52
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous external links, many of which are to PDF files, suggesting a link farm or redirection mechanism. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point towards an attempt to distribute malicious content or redirect users to phishing sites.

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://trafffe.ru/aws?utm_term=certificato+di+conformit%25C3%25A0+impianto+elettrico PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375694/normal_5fd0a989a7f2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381101/normal_5f9dbaba318e9.pdfIn PDF document text
    • https://bawigadumifop.weebly.com/uploads/1/3/4/4/134494387/besibokobida-babexejop-mofasi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427080/normal_5fa515328e5a4.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/tugosuweref.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385028/normal_5fcaca5d928af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417999/normal_5f9ec6c11a045.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410432/normal_5f99a715dd404.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/5236db05-3736-4fde-b23c-2002c9730be6/xifewudifasilopid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09374ccb-9add-4c90-b373-600e6449a75e/south_bend_9a_for_sale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11a4cb58-186e-4fab-8f51-88bf568a36f8/ranking_molecules_by_increasing_polarity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d081243-ea2d-4318-9fd7-4b92c2228683/77263317382.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_off0000d4b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4B2 5264 bytes
SHA-256: d5f1145977c482df650b672ea2b8c975b636e9cd6675934a7081d1da88965a13
font_01_sfnt_off0000e5f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F2 10944 bytes
SHA-256: 01eadf65077bbf5926d8f702e07ee9cd5d3adab05bcd1a4901183041834c5340

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