Malicious PDF — malware analysis report

Static analysis result for SHA-256 f03ea0e8a482e2b5…

MALICIOUS

PDF

52.1 KB Created: 2020-10-28 12:48:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 4815716338b53f315798d46679fb0d7d SHA-1: 1187d0f27e66533237f7496a53d622fcba411544 SHA-256: f03ea0e8a482e2b5099621d0d5237c2135a48b1dbb1f6b09f74abb19b4919274
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://cctraff.ru/strik?keyword=ministry+of+interior+afghanistan+logo In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369763/normal_5f89f3382145c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366005/normal_5f8b32868fafa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382187/normal_5f90394b405fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412387/normal_5f95007917732.pdfIn PDF document text
    • https://sakeneri.weebly.com/uploads/1/3/4/3/134339958/3c6a333e3e3807.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/buvedupugolip.pdfIn PDF document text
    • https://putojedenavaxo.weebly.com/uploads/1/3/2/6/132683165/gevozariwuruw-ruzoxenisoba-nekugagujegam-lisotul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382406/normal_5f92ce06c4bd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5940/7765/files/73755299440.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/silapa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6911/1448/files/somatic_nervous_system.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/4029/0996/files/gotta_catch_em_all_piano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ebbc87d7-2ea0-4ec8-afca-92ee808373a3/davazikilitazolifir.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/effective_nuclear_charge.pdfIn PDF document text
    • https://s3.amazonaws.com/patotale/durga_mata_ki_aarti_hindi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d902277-8dea-4393-b410-4d55c5df1c8b/7271920273.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/1502/0200/files/segagaloteg.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/46277244765.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off0000a8e6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xA8E6 17324 bytes
SHA-256: 80094bdaf3fbe08c3e9e483e909113b1468267a4297934e5db2abc12249656f6
font_00_sfnt_off0000687c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x687C 2968 bytes
SHA-256: a3409f23d318cb64f50816b13ffa5e4cae8c31e9b9ecf1c6aab81bc325688a60
font_01_sfnt_off00007321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7321 5136 bytes
SHA-256: 73f181f8b0c2ed26cc223cba40533a5136c296aa3e57d71b8928b2c0db4450c5
font_02_sfnt_off000084aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84AA 10516 bytes
SHA-256: ae7984fc5a8ecd26dbffbb6e4857fdc7c62c24dde8962b9ccdfe09f16c3c6d98

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