Malicious PDF — malware analysis report

Static analysis result for SHA-256 f73ec2ec529f0aee…

MALICIOUS

PDF

67.9 KB Created: 2020-11-13 08:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6893ada3a188f158438246cef8163ed4 SHA-1: 96cd11468d091c4269e6a1ddee8bfa6d25e2347e SHA-256: f73ec2ec529f0aee94ce8726f8a137f79ca6f47b8d47422ad2bdbbd82590b7fb
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is a PDF document identified as malicious by ML classifiers and ClamAV. It contains an embedded URL, 'https://traffine.ru/aws?utm_term=hernia+discal+lumbar+causas+pdf', which is likely used for phishing or to download a secondary payload. The document's metadata and body text also reference this URL, reinforcing the phishing attempt.

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://traffine.ru/aws?utm_term=hernia+discal+lumbar+causas+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4373522/normal_5fa43efe64786.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374708/normal_5f8c17926d6a6.pdfIn PDF document text
    • https://pefojefevofat.weebly.com/uploads/1/3/4/6/134659321/fcdaec17020ca2f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5fad3b3cab525.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446026/normal_5fae2612b9f6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8701351021d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426814/normal_5f9ed02b7a9f8.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5fa5e2b27a961.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/234936b8-fc20-4869-8902-a39e492b12bb/zijuxedelinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9873386-e8b2-460b-9739-25fd0f9fea1f/darkytown_rebellion_context.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b80c915-c733-4731-b978-9420314fde48/libro_viaje_a_la_semilla.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/406313a1-f043-4db9-93f4-a21269d95d1e/bunn_airpot_cleaning_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a026828-483f-4136-a3d0-864042e23d17/motorola_bpr40_service_manual.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_off0000d046.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD046 5404 bytes
SHA-256: 8134ccbd1ae9fa40398f44212c919c46df52d39dd1e5fb8352a1e4992d026606
font_01_sfnt_off0000e28a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28A 9452 bytes
SHA-256: ceb14a2f5dbb07cfcda775f47e6c67743e26323a9ff5ab70f5015ffa88fa44c4

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