Malicious PDF — malware analysis report

Static analysis result for SHA-256 665a70f2024ef3ce…

MALICIOUS

PDF

73.3 KB Created: 2021-01-15 19:45:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 373b4bfda6dddb4868965f6d9c65022d SHA-1: 8ae46315b1f960156073c62d40e40a621856d1f9 SHA-256: 665a70f2024ef3ced7096c4cca09d7f4ff0a09825ff309f75267fda3012e9755
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains or link farms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of external URIs and the overall structure point towards a phishing campaign designed to trick users into visiting a compromised website.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=clinique+take+the+day+off+cleansing+balm+ingredients PDF link annotation
    • https://site-1171745.mozfiles.com/files/1171745/junede.pdfIn PDF document text
    • https://site-1174029.mozfiles.com/files/1174029/girl_halloween_costumes_2019.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387218/normal_5fc9b4aee4f0a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393515/normal_5f972ac4f1d8c.pdfIn PDF document text
    • https://pobunusegem.weebly.com/uploads/1/3/4/4/134460984/rirobemokaw.pdfIn PDF document text
    • https://gedikitol.weebly.com/uploads/1/3/4/9/134901051/piligiloregu.pdfIn PDF document text
    • https://site-1171112.mozfiles.com/files/1171112/wubopivinife.pdfIn PDF document text
    • https://cdn.sqhk.co/pawijilabu/B5fnsgj/13558363532.pdfIn PDF document text
    • https://rasuzumiketasak.weebly.com/uploads/1/3/4/3/134393825/kodure.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/jolunenafobuw/25104355851.pdfIn PDF document text
    • https://s3.amazonaws.com/vuforewebub/holes_worksheets_by_chapter.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/google_docs_spreadsheet_dropdown.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_off0000e12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE12F 5772 bytes
SHA-256: 431e9743a7625362aebc7b3d708d9e29aa8e162f386f7674d3792285a610972f
font_01_sfnt_off0000f4ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4AC 10268 bytes
SHA-256: d7ea24aa34cd48d9ad92add69aec2e2b3670315a20b21a48f25b6465a9cde8ea

Open this report in the interactive analyzer, or submit your own file for analysis.