Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf5a0179d877b91f…

MALICIOUS

PDF

65.3 KB Created: 2021-01-22 23:41:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 38876ac67e907431aa3dc96c6de56281 SHA-1: d0d23a734be63742577d042579079153d3016258 SHA-256: cf5a0179d877b91f1a3c38cebebdfb03c955d67437560f9cf8e1551f0c363a7c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, many of which point to potentially malicious or SEO-manipulated content, suggesting a link farm or phishing lure. While no scripts were explicitly extracted, the PDF structure and the presence of numerous external URIs suggest it is designed to redirect users to malicious websites, potentially for further exploitation or credential harvesting.

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://leonvi.ru/aws?utm_term=archbishops+council+annual+report+2017 PDF link annotation
    • https://tenipimip.weebly.com/uploads/1/3/4/0/134042327/d60f6.pdfIn PDF document text
    • https://site-1178723.mozfiles.com/files/1178723/bodolejilivatifenaxa.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/6ibKRhc/hornblower_cruises_nyc_pier_15.pdfIn PDF document text
    • https://site-1175359.mozfiles.com/files/1175359/lowenasozusodi.pdfIn PDF document text
    • https://site-1178668.mozfiles.com/files/1178668/nakevulatekumumoneketibit.pdfIn PDF document text
    • https://site-1191111.mozfiles.com/files/1191111/nuzajokemikebekabetuwe.pdfIn PDF document text
    • https://site-1177982.mozfiles.com/files/1177982/complete_mathematics_for_cambridge_secondary_1_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4390638/normal_5ffaa553d10e7.pdfIn PDF document text
    • https://site-1175189.mozfiles.com/files/1175189/confluence_report_macro_examples.pdfIn PDF document text
    • https://site-1175385.mozfiles.com/files/1175385/moksha_yoga_wellington_toronto.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/vibasujefir/bsc_2nd_year_maths_book_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/julaxel/factoring_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/jedadokuti/agneepath_full_movie_480p_openload.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/new_jnc_hypertension_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/pegizaliva.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_off0000c215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC215 5556 bytes
SHA-256: aa50c9e69cc09ec30ae2dd5ba3f4914e65fe8909f3b6b9573fad30ba5381bfb4
font_01_sfnt_off0000d4fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4FB 10308 bytes
SHA-256: 83627f8c8474fa6dccfbacdd9b9e6e66fced9c19259c55cfa1301a51b52dd855

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