Malicious PDF — malware analysis report

Static analysis result for SHA-256 327a4c715d2a689e…

MALICIOUS

PDF

75.0 KB Created: 2021-03-02 11:06:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a97843879b0e83cdc9d07a4fd3ee5d8b SHA-1: 25eccc655a0063b8a4fa9edb811e831d2805131f SHA-256: 327a4c715d2a689ef158fb4a1460f676916559d92525dcb96679499017e9837a
156 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious content. It contains a large number of external links, suggesting a link farm or phishing attempt. The embedded URLs likely lead to further malicious content or phishing pages, and the document's structure suggests it's designed to appear as a search result or informational document to trick users into clicking.

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://pelibifir.ru/wb?keyword=what%20are%20the%20roles%20and%20responsibilities%20of%20health%20and%20safety%20representatives%20in%20the%20workplace PDF link annotation
    • https://cdn.sqhk.co/melipetoluf/ljficMk/rechargeable_hearing_aids_amazon.pdfIn PDF document text
    • https://zutafagufagupak.weebly.com/uploads/1/3/4/2/134235067/182d9.pdfIn PDF document text
    • https://dibarovufi.weebly.com/uploads/1/3/0/7/130776786/tamubesorek-retugo-nezavot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_603d957309c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473375/normal_602c921cc1634.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375203/normal_600769bc2047e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462065/normal_5fcd44d8eea94.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501495/normal_5fefd5c8d81ab.pdfIn PDF document text
    • https://rilumawireg.weebly.com/uploads/1/3/5/9/135981263/316de14229ccb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464068/normal_60274d617102f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368979/normal_60092da9c078c.pdfIn PDF document text
    • http://xepelewatelaziv.getenjoyment.net/gogip.pdfIn PDF document text
    • https://gideturifit.weebly.com/uploads/1/3/4/8/134887905/zagipafawoboleb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372080/normal_5fce15053054e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480187/normal_6023f7b5ebd82.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
    • 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_off0000d91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD91D 5504 bytes
SHA-256: 6634426b3a1bccf3bd22591304505d169331962a916cf319e469c8559e4b0ae7
font_01_sfnt_off0000ebe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE4 10512 bytes
SHA-256: 4d3984a975b134861652f01bdcdb7334541ccde7afec8b5467a726fa1b5f8477
font_02_sfnt_off00010fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FDF 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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