Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb1aaf3f8d89b96c…

MALICIOUS

PDF

70.9 KB Created: 2021-04-05 17:24:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 07fdd22d1e82f056dcb3815e4ea2fd73 SHA-1: 920a2430fddd0af55e9dd6b037eb906dfd3d0a9b SHA-256: eb1aaf3f8d89b96c01cbaa923101f11e0a342776485104ec0260a78ee341683b
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with critical heuristics identifying it as a malicious redirector and a link farm. The primary malicious URLs point to domains known for hosting phishing or malware. While no scripts were explicitly extracted, the PDF structure and link farm behavior strongly suggest an intent to lure users to malicious sites, aligning with spearphishing tactics.

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
  • 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://yafferge.ru/strik?utm_term=what+is+the+climax+in+freak+the+mighty In PDF document text
    • http://solusaxisabo.scienceontheweb.net/il_cattivo_tedesco_e_il_bravo_italiano_gratis.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403937/normal_601b48f1257e8.pdfIn PDF document text
    • http://kexedeziferu.sportsontheweb.net/esl_feelings_and_emotions_worksheets.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458389/normal_5fc9e5c2df5e0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383913/normal_601e722d55fd0.pdfIn PDF document text
    • http://nojigopagapusu.mygamesonline.org/fundamentals_of_electrical_electronics_engineering.pdfIn PDF document text
    • http://sumigemag.mywebcommunity.org/english_grammar_rules_notes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_be39104ce0d04e3c9383c38162c2384f.pdf?index=trueIn PDF document text
    • https://6e37e838-c278-4d46-baa9-25b8497af200.filesusr.com/ugd/fbcb80_f34379a8aba94ce9ba75382f0889e8f2.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xijuxosisomuna/motorcycle_accident_history_report.pdfIn PDF document text
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_a2ad7377cf7e433b963181e0f13a1988.pdf?index=trueIn PDF document text
    • http://wegugoleta.onlinewebshop.net/diferencias_entre_manual_de_funciones_y_procedimientos.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/honda_hrr216k9vka_self-propelled_mower_belt.pdfIn PDF document text
    • https://s3.amazonaws.com/jotogorurekuro/graphing_sine_and_cosine_practice_worksheet_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/apokryphe_schriften.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/xelavesetidujibodefolo.pdfIn PDF document text
    • https://s3.amazonaws.com/luropi/rozulogulemariwufa.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_off0000d7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C0 5544 bytes
SHA-256: 482ad70c413d14a5793f78c81bea718bf984940c48df9e055b60cb8d7fb29aa3
font_01_sfnt_off0000ea8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8A 10672 bytes
SHA-256: 9d1531da8dfc39b7f3fc643505733f001d4091d0d113dd22e93e82df6b61c584

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