Malicious PDF — malware analysis report

Static analysis result for SHA-256 08530d8f5012615f…

MALICIOUS

PDF

75.2 KB Created: 2020-12-19 17:29:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: e178d87bdc26682a1e776bea3832ca41 SHA-1: 1dc2072562811fe2087f8c3b116bbef1adbb1c6c SHA-256: 08530d8f5012615ff8c312e7b685e58b7f34c67b43ef0326d10472c1651ee288
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an external URI pointing to 'trafffi.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and heuristics indicate it's designed to redirect users to a potentially harmful external resource.

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://trafffi.ru/123?utm_term=cats+in+the+cradle+and+the+silver+spoon+cat+stevens PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4503033/normal_5fb2d3a885e7d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383136/normal_5f8fb07b2650a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369766/normal_5f8a4f230c9ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f94d19d942c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379054/normal_5fcbf644bdf49.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371788/normal_5f89c4e139c15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f8a75ce2bbfd.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/xipavir/durixilolefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/971ea5ed-84ff-4318-8687-d6edeea59e6f/equation_differentielle_serie_entier.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd0b2145ca4f7902680ca6/1606224674587/24734678331.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/android_developer_jobs_in_chennai.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc555fff9866f3fd2f163c3/t/5fd090e4125f6a657a4fb51f/1607504101698/27839807044.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_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 5128 bytes
SHA-256: bd1dc8cbebb0f7ed035e71c52e05a11e46c4fac2f31665632f34d9ed0d9deb4b
font_01_sfnt_off0000f78c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF78C 11928 bytes
SHA-256: 0f89df81625e6490cc835a43e4284980d77dc3107b3b5c13bfa045508c4aaeb9