Malicious PDF — malware analysis report

Static analysis result for SHA-256 03b1f62a393f0344…

MALICIOUS

PDF

72.2 KB Created: 2021-01-06 07:49:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: e3702ca33207fcc31f84b3d37e1de637 SHA-1: 8e1c23b62282cf3781fe7b21a610e1354d75d948 SHA-256: 03b1f62a393f03448db6646352be27fb385877b58fa8945c47463869f80b5ac2
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, with a high risk score. It contains an embedded URI pointing to 'https://trafftec.ru/123?utm_term=grassroots+innovations+for+change+%2528gric%2529', which is likely used to redirect the user to a malicious site. The document body is heavily obfuscated and unreadable, suggesting an attempt to hide its true purpose.

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://trafftec.ru/123?utm_term=grassroots+innovations+for+change+%2528gric%2529 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370266/normal_5f8a3064d70ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377114/normal_5f99619172621.pdfIn PDF document text
    • https://botakukejase.weebly.com/uploads/1/3/4/6/134610266/835167.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370304/normal_5ff5312434d07.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414489/normal_5fe6acf6cdd55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402948/normal_5f9dca908c3f3.pdfIn PDF document text
    • https://nodepuje.weebly.com/uploads/1/3/4/5/134518199/kajinak-guwem.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460688/normal_5fc7d03fd36e9.pdfIn PDF document text
    • https://baxelawinojiw.weebly.com/uploads/1/3/4/3/134333718/7628284.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505326/normal_5fbf31f9661c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377381/normal_5fce8d0e66988.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/bc9e48bd-ffdb-470d-a308-5bd5d01d69e2/51677497130.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a75bb26-bcea-473c-995a-51137ad95675/nubok.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_off0000ded5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED5 5356 bytes
SHA-256: 5654b85741ffd2b60204204a5ef997ded4a62045d4bf00f5a433cc15f74771df
font_01_sfnt_off0000f124.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF124 10264 bytes
SHA-256: 2b81c3e2e249d2a4e743b590e00114ddeef5494a26e3d939e16de0eb470f8092