Malicious PDF — malware analysis report

Static analysis result for SHA-256 1de3d914c229bb9e…

MALICIOUS

PDF

77.9 KB Created: 2021-03-26 07:30:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: d5d45a1643b9cc27d5378cd87abec8c6 SHA-1: a5fc5bf94b0cd1d8afae2d601e500c82e0e00d27 SHA-256: 1de3d914c229bb9e21c08825ba3a200d1cdd7801089a58833601b0a6ac262b95
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which are to SEO-optimized content, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards malicious content designed to redirect users to potentially harmful websites.

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://pelibifir.ru/strik?utm_term=how+to+succeed+in+college+with+adhd PDF link annotation
    • https://xasigevas.weebly.com/uploads/1/3/4/5/134595911/kemekufoto_kubasi.pdfIn PDF document text
    • https://leladuginaxiwo.weebly.com/uploads/1/3/5/3/135320554/welugikikenufo.pdfIn PDF document text
    • https://ronumotesagazuw.weebly.com/uploads/1/3/4/3/134373959/29dee3248b38.pdfIn PDF document text
    • https://wanuzixa.weebly.com/uploads/1/3/1/4/131482886/vezalefis.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485440/normal_5feb843350cc7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426267/normal_6036ad74414a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_602c098e8cc20.pdfIn PDF document text
    • https://fafidapumexeri.weebly.com/uploads/1/3/1/4/131437561/2761899.pdfIn PDF document text
    • https://ludugekokokak.weebly.com/uploads/1/3/5/3/135313409/9df1e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4365635/normal_5fe0af19d92fe.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/dupula/free_baidu_spark_browser.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/how_much_does_it_cost_to_get_a_learners_permit_in_mississippi.pdfIn PDF document text
    • https://972af30b-04c2-4618-b911-83ba0b7fef9e.filesusr.com/ugd/84a5c6_82ad55e355a34306a24e9203c0bbe620.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/budovewesekaz/nuzopigixogezinetozen.pdfIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/avatar_movie_hd_wallpaper.pdfIn PDF document text
    • https://edcb5511-827b-40b0-97c1-3499c313f96b.filesusr.com/ugd/0779a3_b3485b690b4f427ebc6422a6822e28bf.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fofeguj/what_is_a_plc_course_in_ireland.pdfIn PDF document text
    • https://591e60e9-54e8-4b06-a9a7-f2e0522969d0.filesusr.com/ugd/1fd4b7_4556b36af4ba42e5817b8958705fcde8.pdf?index=trueIn PDF document text
    • https://969948a0-d7f7-4827-958e-a3856fee42d4.filesusr.com/ugd/9d40bc_e877cc1df9e04f9ba7441098fbcb40d3.pdf?index=trueIn PDF document text
    • https://f8d82b49-d438-4da2-b906-f876cb6fe635.filesusr.com/ugd/12dc78_4cb7173f467b44bb876174d4f4a7bed7.pdf?index=trueIn 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_off0000f507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF507 5160 bytes
SHA-256: 90ed5d4f4e53a100a5f5e66a031697cde0e7fdf2f8ee14472db1b73958ebf071
font_01_sfnt_off000106a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A5 10312 bytes
SHA-256: c9089814b9960d3869e207be26e06d17774b992cb5ac3b9e6b9b09e6f1a5e2c1

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