Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdde4591d4b04d8…

MALICIOUS

PDF

73.8 KB Created: 2020-11-11 03:45:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c2b9a24b5b137983c9defd352759f32d SHA-1: 961333af527c35a137333e11cf24ea810b3b27f8 SHA-256: 8bdde4591d4b04d8255a5176a950ffeaa4e1bfc48b0d0740e9cb6f215204aaed
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 0.9997

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://trafffe.ru/strik?keyword=ti+84+emulator+app PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4406482/normal_5f97563fd2a91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479906/normal_5fa643ef64e85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_5f9aebd70009c.pdfIn PDF document text
    • https://zilavexeredora.weebly.com/uploads/1/3/0/8/130874610/selinimafimigoto.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386613/normal_5f997618761f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5f8ae9eb937de.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/xoxaneral/74597417407.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ca08a6d-5736-4fa4-bb2d-7221eb9112fa/oberlin_winter_farmers_market.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ab08605-212c-4f9f-84d0-053a7d3faa34/31726735642.pdfIn PDF document text
    • https://s3.amazonaws.com/wonoti/46676817651.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/23460694243.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd5629d4-70f8-48d8-aff6-cdebbc8ad4d2/54663405985.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1065f8a-909c-4232-8cc5-5ad8f269f737/11920519782.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB75 5016 bytes
SHA-256: 685ff1647f9ccbd4e49c2283030ac342013133abd23276a95cacf4892b5c61c9
font_01_sfnt_off0000dc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC6E 11412 bytes
SHA-256: 98cf0f10159e32b8a7b18c06eafc453e104121cd0c417767c71c097103d7f396
font_02_sfnt_off0001039a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1039A 16776 bytes
SHA-256: 974c79fba6a2cb05f3bb6ed2de8face849f2a6b4eb746d7ca10a00b53a01da02

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