Malicious PDF — malware analysis report

Static analysis result for SHA-256 93328dbfa78691e1…

MALICIOUS

PDF

69.4 KB Created: 2020-12-24 01:57:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: dd336b4e85b94b3a3a5233ce2850dc45 SHA-1: 631d4c1b57b5d781f3a0a99f20a2360116c6e18e SHA-256: 93328dbfa78691e1188f9e09547d8a00c30ef4c2db307aa99ee0e9e2fc343f2e
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 0.9995

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://traffset.ru/123?utm_term=emociones+que+matan+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369768/normal_5f8827003e314.pdfIn PDF document text
    • https://cdn.sqhk.co/gopefovepagi/hgOZhbQ/infectious_diseases_treatment.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370540/normal_5f9de61356cc2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406812/normal_5fb3f6db4c7e9.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/kizugokofo/caltrans_standard_plans_2015.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/11992487536.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/arecaceae_family.pdfIn PDF document text
    • https://s3.amazonaws.com/sulasatevirexo/wedumisuzimotoxefiximud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/11da3d7b-1fc7-4bee-acbb-f8441dcc2b99/varozezumovexedosisavowo.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/b._e._t_awards_2018.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_off0000d012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD012 5256 bytes
SHA-256: dabf032881f5a3c0b95e291298d7cc03129c810d4f0426438c6191143bf9dc53
font_01_sfnt_off0000e1e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E9 11692 bytes
SHA-256: 2f840a5d9ef5de3f071b3f160f2d9362d40551971f40f0cc000fcc3982beb3a8

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