Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6f72d1fc428fe33…

MALICIOUS

PDF

69.4 KB Created: 2021-05-20 14:10:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 1e54a4eeab4f67c743e8e719930117d4 SHA-1: 2717a0061078935d6cacdcb083a71d73eb7d1c4d SHA-256: e6f72d1fc428fe332fbaa89ba883f7a9a78139238d5d14c725099819f4898f72
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to Weebly-hosted PDFs, suggesting a link farm or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' point to an attempt to drive traffic to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://botokaw.ru/strik?utm_term=pokemon+liquid+crystal+evolution+golem PDF link annotation
    • https://nagajaburelu.weebly.com/uploads/1/3/2/7/132740350/6540417.pdfIn PDF document text
    • https://tazivori.weebly.com/uploads/1/3/1/4/131438523/wodapodijevogif.pdfIn PDF document text
    • https://sujibovuf.weebly.com/uploads/1/3/4/7/134705076/jufoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505102/normal_606acf696b2f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476947/normal_6052c152ad85a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_6061c11071adf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392439/normal_604ee88d4920b.pdfIn PDF document text
    • https://dunufofobepo.weebly.com/uploads/1/3/4/3/134380723/c779e1b122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377403/normal_5fd7bf853fe15.pdfIn PDF document text
    • https://kozamenarolu.weebly.com/uploads/1/3/2/6/132682647/682614.pdfIn PDF document text
    • https://pajopujo.weebly.com/uploads/1/3/4/3/134305169/968790.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/pewebopufupe/zuludizizosubuxobu.pdfIn PDF document text
    • https://s3.amazonaws.com/dukexajuj/78559943975.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b96dd57-b1dd-42e2-be1e-e026212dfaf3/74591210653.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/digevu.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/cateye_volt_300_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/66545449711.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/autoimmune_disease_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67783c29-f0e0-4c1f-9b12-42ee10811879/21914842618.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/44604969097.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6177c3aa-8141-4386-8ed5-6e38f127bca5/how_to_adjust_coaster_brake_hub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c70de17-c1a9-44f7-8777-b28df598ad5f/zulibutebozure.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/divinity_original_sin_2_guide_book.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_off0000cf84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF84 5612 bytes
SHA-256: 836e19fe0a1e933757ae370d98033c001b0f5932719f3ff7f2755da76f5d75f2
font_01_sfnt_off0000e299.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE299 10536 bytes
SHA-256: c52ce51fca740fefe9698687a0740b12907309477d3a73ac2cd6e86e6255c091

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