Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed3ea18669a6c5…

MALICIOUS

PDF

77.5 KB Created: 2021-05-24 18:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 935687da1313e13a0808e2a7e66b6aa3 SHA-1: 1cbbbff242c6adaa567f5705b4e005833aa359ab SHA-256: 09ed3ea18669a6c551062473bb5d1ed7e98be59b5d641f4448a58d7ff15f9efa
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains a large number of external links, primarily hosted on Weebly, which is characteristic of SEO link farms or content distribution networks for malicious files. While no scripts were explicitly extracted, the PDF structure and the heuristic firings strongly suggest it's designed to redirect users to a large collection of other PDFs, potentially for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://defosojuregoko.weebly.com/uploads/1/3/1/3/131383900/bunafojusawawexeniga.pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4415534/normal_605a02f7923a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380527/normal_5fe0c5cab1c66.pdfIn PDF document text
    • https://tugixafebav.weebly.com/uploads/1/3/2/6/132681891/5415812.pdfIn PDF document text
    • https://dumidonawusirug.weebly.com/uploads/1/3/5/3/135306770/815474fc83.pdfIn PDF document text
    • https://nagozexifetuli.weebly.com/uploads/1/3/4/3/134340384/zajunamudavapul-venudax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455208/normal_6067231cc189e.pdfIn PDF document text
    • https://sujolatako.weebly.com/uploads/1/3/4/6/134624807/mavanes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487625/normal_6003393777471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413475/normal_604cee1a1e5d1.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/1767516.pdfIn PDF document text
    • https://menafove.weebly.com/uploads/1/3/1/4/131438456/fepifuxibagunufuk.pdfIn PDF document text
    • https://wodiwige.weebly.com/uploads/1/3/5/3/135317556/wezilotig.pdfIn PDF document text
    • https://bilujadaju.weebly.com/uploads/1/3/4/7/134772480/xudobijininoko_tupaj_fusijibas_wukuluvekukuwab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/vAIYpVcV8Aw/wb?keyword=english%20speaking%20daily%20use%20sentences%20in%20urduPDF link annotation
    • https://s3.amazonaws.com/nijudow/59700481784.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/how_does_an_ar_gas_block_work.pdfIn PDF document text
    • https://s3.amazonaws.com/fekaduvopigab/website_template_for_import_export_business.pdfIn PDF document text
    • https://s3.amazonaws.com/difigomisosak/1984582866.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/renipasesowurepulux.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/zivafawovat.pdfIn PDF document text
    • https://s3.amazonaws.com/kesumasaka/depaloxa.pdfIn PDF document text
    • https://s3.amazonaws.com/kumasala/30642642676.pdfIn PDF document text
    • https://s3.amazonaws.com/wezukep/fadiwitanarujamosubule.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_off0000f155.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF155 5456 bytes
SHA-256: 232b9bdb9106d21063d7cc6f898a17cdaa3dfac5787fbea106fa95acb74d4172
font_01_sfnt_off000103f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F1 10552 bytes
SHA-256: 9d1cf0575233da3cb00b47191d90aa932087f76cece26407269cbb12a7f30090

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