Malicious PDF — malware analysis report

Static analysis result for SHA-256 eadeeba0b169f989…

MALICIOUS

PDF

65.7 KB Created: 2020-12-18 18:39:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: b05ae0cf237bef052c7ce9a181ff4886 SHA-1: 659bd35037a3212332674c0ba1e4d95ea8a26242 SHA-256: eadeeba0b169f989e1175b6cef979d3adebf5b97e4c8b3f041e787695a4a5d89
126 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains numerous external URIs, with one pointing to 'trafftec.ru', suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of embedded links and the overall detection profile point to a malicious PDF designed to redirect users to 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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=scroll+of+pedigree+dnd+5e PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375909/normal_5fbd4b2284ef4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426675/normal_5fbc5ad01e814.pdfIn PDF document text
    • https://wevuviwujito.weebly.com/uploads/1/3/1/6/131636984/254f18b69.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408184/normal_5fa732dff0f54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376103/normal_5f8d6c377f5bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_5f922ee808117.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393028/normal_5fc71b6df0244.pdfIn PDF document text
    • https://fiwisito.weebly.com/uploads/1/3/4/7/134715438/wajub.pdfIn PDF document text
    • https://jujepuwajepoxox.weebly.com/uploads/1/3/4/4/134466337/38efd2f8e.pdfIn PDF document text
    • https://segitosul.weebly.com/uploads/1/3/4/8/134886040/newaxutepoletukabur.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/rubidokezive/the_act_of_marriage_book.pdfIn PDF document text
    • https://s3.amazonaws.com/dutuzanob/difficult_riddles_and_brain_teasers_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6bca0aa0dc1643a2ca0c5/t/5fcfd0cb4e616b4e3eb1fb73/1607454923565/48523971908.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_off0000c5a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A3 5164 bytes
SHA-256: b811a0270a32875c013657f79e0e2de26a7e31f900f9788ad550fe524569af15
font_01_sfnt_off0000d74d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD74D 10300 bytes
SHA-256: 741dce26b36f831ab68fc6d46395f9e5be35191996d5a98e80f3df9652ce5f8d

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