Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d460dc4b73d08e4…

MALICIOUS

PDF

129.7 KB Created: 2021-05-08 00:36:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: bf6474a3022b49e95d47a03e0c1b93b6 SHA-1: c3cfce65fe97650749b670d549024bcb53df644d SHA-256: 9d460dc4b73d08e48e46f52e649c0edd3a91c49c66c9f67dc0271f466e2525c3
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains a large number of embedded links, many of which point to disposable hosting or redirectors, suggesting a phishing or malware distribution scheme. The presence of external URIs and link farm characteristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/strik?utm_term=economia+en+el+siglo+xix+en+espa%25C3%25B1a PDF link annotation
    • http://hookup673.site/28272370944b8n2z.pdfIn PDF document text
    • http://pusokum.66ghz.com/12936054907.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459629/normal_600668ffee34f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490736/normal_600733d9d6788.pdfIn PDF document text
    • http://ezfix.asia/3839005450xy8e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495696/normal_60587a03c2e4e.pdfIn PDF document text
    • http://trokot-shopnew.online/brother_ds-720d_error_code_2019nmry2.pdfIn PDF document text
    • http://chisto-chisto52.ru/que_significa_el_titulo_como_agua_para_chocolate3o9ud.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408706/normal_6017492fc4da7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://5da1c7d8-01c4-4175-bbf8-c25915566394.filesusr.com/ugd/1084fb_d2e6f1d683d64dc1b13e0329e9b6f30b.pdf?index=trueIn PDF document text
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_0cf7db5a713c40bb914cb4b3da3ddcd7.pdf?index=trueIn PDF document text
    • https://84daacc9-7e90-4c5d-b1ed-526950900c49.filesusr.com/ugd/73f3b0_880a74f3f5c54dd5bb855635313698b8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/60371363693.pdfIn PDF document text
    • https://s3.amazonaws.com/rogugagatuf/ps3_slim_disc_eject_problem.pdfIn PDF document text
    • https://0c7ecde5-8d52-4b6d-bf00-bcb9beb5fd3c.filesusr.com/ugd/b6f5a5_75ccc1a48fde4a6d928e1de31ca1d28f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/niwotipugonuvoz/avoiding_logical_fallacies_worksheet_answer_key.pdfIn PDF document text
    • http://pikexiwa.epizy.com/download_novel_calling_sehmat.pdfIn PDF document text
    • https://3f054cde-0430-4828-89d0-5f77035cf230.filesusr.com/ugd/d93890_22dc8e5f0c944dcfbb3974b4dc722b59.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/logical_thinking_process.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001ab09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AB09 5392 bytes
SHA-256: a0bb0c4c0cbddf39c2b75e42b528f3d4d903c39fff6876e35ee145bc6096f2b8
font_01_sfnt_off0001bd0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BD0E 6636 bytes
SHA-256: cd5b5bfe30a9f2ab7c8ff16cae69a6ad428f39f5e83e572661c1163a058c8f64
font_02_sfnt_off0001cea9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEA9 12340 bytes
SHA-256: 1f51895a4bc528ce8155cfa39d7a902ceb0e779e276369eaab8ef9062337d5ea

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