Malicious PDF — malware analysis report

Static analysis result for SHA-256 7767700928cbfdf0…

MALICIOUS

PDF

80.9 KB Created: 2021-05-01 22:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 56e04facb38ba8533161625f256aae71 SHA-1: 1276fd0437923756586b60fb356fb31fc62233e0 SHA-256: 7767700928cbfdf0141506fd5369c0b83c01495b5b83ebc11378bae2c282be61
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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://botokaw.ru/strik?utm_term=what+should+be+on+a+movie+poster PDF link annotation
    • http://supermagazforsale1.xyz/97065085962mowx1.pdfIn PDF document text
    • http://wejaduz.mypressonline.com/ahmad_faraz_poetry_books.pdfIn PDF document text
    • https://cdn.sqhk.co/nubokeso/jjc1hao/driving_school_2018_download_for_pc.pdfIn PDF document text
    • http://vijevejumozugim.sportsontheweb.net/gate_2020_syllabus_ece.pdfIn PDF document text
    • http://vitetoka.scienceontheweb.net/88608784594.pdfIn PDF document text
    • http://sajiwurejedetu.sportsontheweb.net/nafudago.pdfIn PDF document text
    • http://playmarket-online.com/sifozivokakasovisewuwadet4396.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/gd4MLPa/jisos.pdfIn PDF document text
    • http://xanarixumafiju.iblogger.org/working_principle_of_hot_wire_anemometer.pdfIn PDF document text
    • https://cdn.sqhk.co/logulemuset/z5aZohe/xajivajapikul.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/hbOUgf2/username_generator_discord.pdfIn PDF document text
    • http://xitnet.fun/61026331933qql4x.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/gieifgg/34528591350.pdfIn PDF document text
    • http://buwovavozu.getenjoyment.net/applied_probability_and_statistical_methods.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_02f4a7ab5fe54a8b9339d1737a2c255b.pdf?index=trueIn PDF document text
    • https://5e7fdb44-65a6-4d88-9b36-b69c04d36e08.filesusr.com/ugd/b547b4_3bba1ee0564b41dd88d5cd32b89fd565.pdf?index=trueIn PDF document text
    • http://xirakogo.epizy.com/kutedegebadeza.pdfIn PDF document text
    • https://6acf0ca1-aa41-4771-8b91-54baff69ee7f.filesusr.com/ugd/7d1dc9_577f62e4f29246f9961a5c804b6eec32.pdf?index=trueIn PDF document text
    • http://matezule.rf.gd/79004318769.pdfIn PDF document text
    • https://d128792e-e0a8-46e0-98ed-b941f5da69b2.filesusr.com/ugd/b98abb_a7429125cd22405e93a3a21a7cd8a353.pdf?index=trueIn PDF document text
    • https://f6ea5e03-7e7c-4dce-82ee-fd5d223759ef.filesusr.com/ugd/d203ad_01a343567c1d4b5487f0b123e02c6dcd.pdf?index=trueIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_c09e412beb314c27a36ebb1523bc5888.pdf?index=trueIn PDF document text
    • https://5053e88e-9e18-4719-890c-32a1cca0295d.filesusr.com/ugd/411503_aaa428eeadef4bb8a0f1a0a656356c29.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_off0000fe22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE22 5412 bytes
SHA-256: 8627501154323ff91f76e59b949d66a1d97a331bee5be3b12199c3a8de22f068
font_01_sfnt_off00011063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11063 11040 bytes
SHA-256: 5e8d68bea19019647a88f0e859bf7763fcd44833c488826cbc46eed423d54ee1

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