Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba50468cd583b319…

MALICIOUS

PDF

74.2 KB Created: 2020-12-28 06:39:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 9d993ad75498d1192818dd9a9aecd275 SHA-1: 19fa605db880e134502a5f6d992f4eae968291ce SHA-256: ba50468cd583b319958d7d27cb898714898cb68d28fe64093f7cd097c7687ab5
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 other PDF files, suggesting a link farm or phishing campaign. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external links are indicative of a malicious document designed to redirect users to potentially harmful content.

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://trafftec.ru/strik?utm_term=kelty+hearts+fc+stadium PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413110/normal_5fe9106241705.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417137/normal_5f9af13abbda1.pdfIn PDF document text
    • https://givifajilodox.weebly.com/uploads/1/3/0/8/130874655/4300109.pdfIn PDF document text
    • https://gopiwalugase.weebly.com/uploads/1/3/0/7/130738825/2744780.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393044/normal_5f927fc7b2085.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366995/normal_5fad698169a24.pdfIn PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/9012615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_5f9dabaaa18e5.pdfIn PDF document text
    • https://voxomusixexuso.weebly.com/uploads/1/3/4/8/134851372/gijufebixupin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f870fee76d31.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462376/normal_5fa5015f431b9.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/mutirexa/seziwubelaxaku.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/dusimidub.pdfIn PDF document text
    • https://s3.amazonaws.com/bejideba/m_dhgate_sign_in.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzufexarevima/19559682976.pdfIn PDF document text
    • https://s3.amazonaws.com/pezofut/lenobusubevuku.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_off0000e35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE35E 5332 bytes
SHA-256: 271eef7b10eea7863c7d65d41aa151945df4f0d5b9f416d1ffe1a9b138ddbb9a
font_01_sfnt_off0000f567.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF567 11312 bytes
SHA-256: 309da09f4e06bc5232eaea2e514b9f524c97be9fc43287d61f62ffde137c11d0

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