Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee3121e438a1a57f…

MALICIOUS

PDF

91.1 KB Created: 2020-12-07 13:08:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7aee0ea1ce6a1301ebb0fdfc0e24ed9a SHA-1: 9c6e92467f8948f1b56407bee0af4e44ae55d9d7 SHA-256: ee3121e438a1a57f5b2d4ef2c31ef254613affe46b27e9a9f25e47e6b48d11f9
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffnew.ru/123?utm_term=jfk+new+frontier+programs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391620/normal_5fb29e5513b80.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367911/normal_5f9a62a84186c.pdfIn PDF document text
    • https://xexiwimelogodit.weebly.com/uploads/1/3/4/5/134593193/5eaadd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5fa08d1a20d46.pdfIn PDF document text
    • https://muneberixiloza.weebly.com/uploads/1/3/4/3/134339704/9148877.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409395/normal_5f96763e63ba8.pdfIn PDF document text
    • https://domenotupeloli.weebly.com/uploads/1/3/4/6/134685365/6ab90040fef9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5f8849a249ea2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366350/normal_5f8c6b5d41f8f.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/6fd1cdf7-d347-46fd-8d9d-ca9d7d01cbe1/world_currencies_word_whizzle_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc781e15c272238a81a89ed/t/5fcbfee9a87f9f1b19c3db6a/1607204586068/bmc_healthnet_plan_masshealth_mco.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5222f43f-aec6-420b-9939-3987946a52c8/wubafatas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8ed1afd-315a-47ec-aa38-6b0278041f8f/66603564004.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5db779955c744b55d5a92/t/5fca566a74bf0311784fddba/1607095914576/kinujiridexetawu.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_off000127b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B9 5332 bytes
SHA-256: 6099927d0400083b53c150fcfd122cfc6555a71038c718a42b6691a5ff3fc621
font_01_sfnt_off000139e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E5 11072 bytes
SHA-256: 8afa0e717b33631b0c877b8726f734d80e0b934caafc9d6975da051f5a77f3c2

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