Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5a9340373afc31d…

MALICIOUS

PDF

73.1 KB Created: 2020-12-05 07:56:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9518325ae538e20d736b132cf845b3a5 SHA-1: 90769cd4553baaa30773ed16294a01171721fd38 SHA-256: d5a9340373afc31dce8387e491fd19d484912bc94e58e386b2bb95d78ab6d5e5
136 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses a password-protected-archive lure. 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 0.9997

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://traffking.ru/strik?utm_term=eco+365+week+5+knowledge+check+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387699/normal_5f923f9fd7ee0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388293/normal_5fc5c0b685d84.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_5f9a3b550893d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f885fb551a3b.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/d27195ec-fc55-4bf3-9d3f-0da2964ec9d6/18244647361.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf149b4c4d833b8bc80f0/1606218059145/fotegasezuwajaf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdde6063-88ba-4951-8814-c7bfbf462250/49914494664.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/939ee1ec-1f9d-40ca-afa3-af57351990bc/13147351892.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/626133e9-58f3-4e10-8e04-f53a7b1894d8/the_viking_spirit_an_introduction_t.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10304b8467722f1d4df02/t/5fc5f9551972c46e3c6c1790/1606809942246/kebanusebo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e2740a2757459be2c9b8/t/5fcb133e7ab0f364aba63714/1607144255059/4492631115.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbceff4b474932ca2664dda/1606217716959/rolling_sewing_machine_tote_with_wheels.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/862bb355-9afb-4687-91ba-46c9bf5248f2/61240380987.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_off0000de92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE92 5756 bytes
SHA-256: c9331772a583a88ee0c02ba92637bc8c6654b52d174105d715e3d8eabbe34be9
font_01_sfnt_off0000f23b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF23B 10940 bytes
SHA-256: df8c4e02f73768951a0ca5941d8c989aa68d73792c2b927bb2f7144cf1dc89e2

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