Malicious PDF — malware analysis report

Static analysis result for SHA-256 c011944b279bef5d…

MALICIOUS

PDF

81.4 KB Created: 2021-03-23 05:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6622356eb91234a10f42b7ebdd9bd522 SHA-1: 5883fcdebbed0df32750022c3fcf12ec8d0c1ca0 SHA-256: c011944b279bef5d2bf1ba4005bf7732b7d0d36dcab1a0935e5d755d2597c793
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious redirector pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • 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://dafemum.ru/award?keyword=mapa+turistico+bratislava+pdf+espa%25C3%25B1ol In PDF document text
    • http://ru-payment.casa/color_to_do_lists_tasks_reminders_exevmjmx.pdfIn PDF document text
    • http://xugafigipi.22web.org/78837900030.pdfIn PDF document text
    • http://tk-pobeda.site/vejezilewozokaluti1ao18.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451954/normal_6005c15354147.pdfIn PDF document text
    • http://lozajakar.iblogger.org/36355218907.pdfIn PDF document text
    • http://vibigalobonewil.iblogger.org/26921937566.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471481/normal_600b616f5f38f.pdfIn PDF document text
    • http://sait-ok.ru/audited_report_companies_act_2016mqr2w.pdfIn PDF document text
    • http://reduslim-europa.site/14074244948bmhk6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450244/normal_5ff9347de07f9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b5fd0e2-88dd-42ec-989a-d554fe1cc0a4/17229738194.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20c1dd9e-8a17-4462-a96d-8ddb0e51fe9f/nadimir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d9a90c7-8832-4994-a2ba-be57d22acd20/37062157242.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20557dbf-e815-4d2b-8f87-95dafeda6849/how_to_get_all_endings_steins_gate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8859e4a-0207-4c11-a90b-edcdd3491ef8/95449170774.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73113432-a31f-4fae-9252-002013e040fa/2622644474.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/226f9eff-8d49-42eb-900d-1842b32e2f33/15204844883.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f998185-5dd3-4bef-8985-6f9b62f2db30/what_are_the_types_of_symbiotic_relationships.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/45a7e969-76a2-4dc9-8c21-35d65f257357/the_bluest_eye_toni_morrison_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0457f4e7-677e-421a-822b-c361e86ce1b3/why_greek_gods_were_created.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_off0000fa94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA94 5564 bytes
SHA-256: 2b6d4cff4b7c21264c18c3b87e627e2a3d92c6ab04395c8983dbb62946388365
font_01_sfnt_off00010d5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5B 13060 bytes
SHA-256: 472828c9242c42e7b7ca95a2252fc1ec48ae1d70420f0a1518b0ff02f8ad1978

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