Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef90fabd10864eae…

MALICIOUS

PDF

63.9 KB Created: 2020-11-18 00:32:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3e4b3653cd84a4b2f501f76fef95f995 SHA-1: 25f7dd0df19788839668995abb8a5204528bca66 SHA-256: ef90fabd10864eae73c8dc1045e0ce9bc738633f512a164441144166dcccd4a2
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 0.9998

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://traffking.ru/123?utm_term=mary+kay+focus+folder PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378378/normal_5f9d72c84e5bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368953/normal_5fa97d566092f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424007/normal_5f9d7a3bcf437.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459323/normal_5fa7f55835ac9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387715/normal_5f8ebe663d998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422912/normal_5f97e705505c6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379046/normal_5f8a7582bea3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410702/normal_5f99e0e166e4b.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/bulikowexunepov/asfixia_neonatal_gpc.pdfIn PDF document text
    • https://s3.amazonaws.com/wapabefizosumi/45390464127.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/16930617363.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_off0000ba13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA13 5184 bytes
SHA-256: 078571d06b7e0b162ac396d8889d380137c2b633a29650cb128120d864304302
font_01_sfnt_off0000cbe0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBE0 11156 bytes
SHA-256: e09b18aee2d8a038bbd92aa6acff8bcab619e4f573cc2c0822be9ac9ef338678

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