Malicious PDF — malware analysis report

Static analysis result for SHA-256 d222e0efa2546418…

MALICIOUS

PDF

67.5 KB Created: 2020-11-18 13:36:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: ede8dc5dfda61d4ae3838df914cf281b SHA-1: b31773a96a65401e79a86d56478afd05960e51be SHA-256: d222e0efa254641887f04b431c962d02b43642335ade73af00a20f27970fc9df
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple heuristics indicating malicious redirection and a link farm, with a high ML classifier score and ClamAV detection. The embedded links, such as 'https://traffmen.ru/strik?utm_term=the+witches+book+pdf' and 'https://riramiseba.weebly.com/uploads/1/3/4/3/134369938/dejaxabelunokejefuv.pdf', are likely used to lure victims to malicious sites. The document body is heavily obfuscated, preventing a clear understanding of its direct content, but the presence of numerous external links points to a phishing or malware distribution attempt.

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
  • 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.
  • 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.
  • 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://traffmen.ru/strik?utm_term=the+witches+book+pdf In PDF document text
    • https://riramiseba.weebly.com/uploads/1/3/4/3/134369938/dejaxabelunokejefuv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422168/normal_5f970168c4ae5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485705/normal_5faf4d2b8fd6c.pdfIn PDF document text
    • https://fekebejoluxoji.weebly.com/uploads/1/3/4/3/134309121/kuzaxonazixi.pdfIn PDF document text
    • https://juvuxoxeziw.weebly.com/uploads/1/3/4/3/134313380/3058905.pdfIn PDF document text
    • https://zejibafubetu.weebly.com/uploads/1/3/4/1/134108860/558c1171.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/7c44b0c6-0e9c-410c-9e48-e7b84eb9a747/hose_guides_cast_iron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b8df7d9-af32-4566-95aa-9fd039194985/sears_ksx_super_35mm_camera_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3e3ad50-2b60-4142-8ca0-7204813fd74f/44614179084.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dadaa9f5-3559-4b80-81b5-f7975a58d6aa/unblocked_pixel_warfare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9df8830-3503-4978-8f85-abd0a7540329/sowenawodopidos.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_off0000cbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBCF 5148 bytes
SHA-256: 460e0362dfea777868b33c8460376ea851404127b428f255dbfbe80b813ec618
font_01_sfnt_off0000dd6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD6B 10628 bytes
SHA-256: 624dd500250823234d9f1f9bd5d05a625668f1a536237447b28beeb29de24532

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