Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbd991d8175fedfc…

MALICIOUS

PDF

76.8 KB Created: 2021-05-30 01:11:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: bf29e9cdab05e05e6aa99bba82b855af SHA-1: 9b901b5d8a418ed7276270700c165595931a0c4b SHA-256: fbd991d8175fedfc4319c63d0daad0a7afff82f6327def4a36f73863cacbc5f5
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://xezojetit.ru/strik?utm_term=milestones+for+a+3+year+old+with+autism PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4476270/normal_600761cad43ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416321/normal_6039fc1e2a3f8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494874/normal_5fe3bab8571ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404984/normal_6027b45611c61.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387036/normal_5ffa861ab91ea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369502/normal_60247c1a5e636.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408481/normal_602d488c9f79b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368227/normal_60638b5a715aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454809/normal_601922788b3e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409614/normal_5fd2e9edafa23.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409123/normal_5ffa156d4e1b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464522/normal_6053aa01e92db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470552/normal_6054214f6f41d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496193/normal_6065451ade514.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419846/normal_5fc622cdd799d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446155/normal_6052810c2fcf9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378628/normal_5fde21bd33c56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405419/normal_604106868565c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449996/normal_5fd2972f6e9f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387938/normal_5fe73efede16c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474191/normal_5ff3c0925eb54.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/42ae78e9-518f-4195-9102-bf47036e42dd/informative_writing_topics_for_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff7219dc-7352-40c7-8ad5-a1ca373cca46/ford_mustang_convertible_2021.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_off0000ee8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8D 5508 bytes
SHA-256: a0404d634193e3054984cfc029dcdc6ca34bfeb577295ac724fa0bd48e84d60d
font_01_sfnt_off00010143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10143 10732 bytes
SHA-256: c98e6fa63b8336e02c35906ad419f246f738dc1631f14f68fd7a56b3bf028374

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