Malicious PDF — malware analysis report

Static analysis result for SHA-256 deb0d181362d2b29…

MALICIOUS

PDF

66.0 KB Created: 2020-11-24 04:00:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 449d32fce7237c41a72ba82902786a29 SHA-1: e78a28bde7ea6b88a7cf1f9bb0ca963d4a61799b SHA-256: deb0d181362d2b29b6d7cdac785ddc12f490ca391e9d8ddf84189559f6cf1012
214 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by multiple heuristics and a machine learning classifier, indicating it is likely a phishing or malware distribution lure. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The presence of numerous external PDF links suggests a link farm intended to drive traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://traffking.ru/strik?utm_term=adineue+font+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5f874f6aa60b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365584/normal_5f91d79d2d2a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403805/normal_5f9811d7b2a44.pdfIn PDF document text
    • https://mawoluji.weebly.com/uploads/1/3/4/2/134265904/5388693.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366010/normal_5f8a2d87a4bd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424376/normal_5fb966ba7cc0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369656/normal_5fa636b99a0e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_5f96eb3487d1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379610/normal_5f90d39300d36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393361/normal_5f9c63b590cc9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379048/normal_5f8a2d9adbd43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470962/normal_5fb2e01074540.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_5fb566ad4a138.pdfIn PDF document text
    • https://fabedajigunud.weebly.com/uploads/1/3/4/4/134480588/vevitelikupibi_pametazo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/ragejufa/spread_spectrum_in_mobile_computing.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/escambia_county_arrest_records_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b7e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7E3 4352 bytes
SHA-256: 8b1f97ee358b4cc1b544e661f26e9e38098b4c5607b7180b0136bc23a34fc778
font_01_sfnt_off0000c6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B0 11576 bytes
SHA-256: 400fca8a848ad6a73eba9f5fa2c631411dcaba214cc3d5fc50c03e4a4c7367e0
font_02_sfnt_off0000ed4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4B 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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