Malicious PDF — malware analysis report

Static analysis result for SHA-256 83b2be4185bd6237…

MALICIOUS

PDF

67.9 KB Created: 2021-02-25 20:40:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: e66a119fae612bcf388a6817894639c7 SHA-1: 9fd93e9ad93c47815882a809d060a92099129cc7 SHA-256: 83b2be4185bd6237565fd841abb5ff005ec5f601da3027552cf1aa4256279ed8
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by directing them to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jacksth.ru/strik?utm_term=health+and+safety+plan+for+construction+sites PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4417983/normal_6037520725816.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454575/normal_6015b9eeb7170.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458625/normal_6034517a3a754.pdfIn PDF document text
    • https://cdn.sqhk.co/tetolonul/FPQOial/sipabevovudorogagujeku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450898/normal_60217044aae84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409798/normal_60155658442fb.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/wuwoxib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414164/normal_601ca280cbb7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403683/normal_5fef161b5ec04.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390051/normal_602e4f7d1cc8a.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/can_you_keep_a_secret_lyrics_utada.pdfIn PDF document text
    • https://cdn.sqhk.co/zujubiviv/hcKiehb/pimelisoretipexik.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/mukutud/jeterutozixepiduvovomim.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/advanced_asp.net_mvc_interview_questions_and_answers_for_experienced.pdfIn PDF document text
    • https://s3.amazonaws.com/zumezeviwakiz/guider_aither_buff.pdfIn PDF document text
    • https://s3.amazonaws.com/tufitijinexu/zowaponapu.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_off0000cda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDA4 5308 bytes
SHA-256: 29f88137338b7f18eeea1de25c64ab87eccd2901e088bde50bf077ca48653acc
font_01_sfnt_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 10304 bytes
SHA-256: 2bc9417b36e1bddf90de173317084d8f2223f17650f3b1dcf81ad925ed62fc21

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