Malicious PDF — malware analysis report

Static analysis result for SHA-256 f913e833f036e216…

MALICIOUS

PDF

133.2 KB Created: 2020-12-17 21:02:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: e944ccb6d6a320fca4ed07ba4353a00c SHA-1: 3154644653437995853a4a26b657ae67c1be73e7 SHA-256: f913e833f036e216f412c38b232b03b5b214b264fb10d8619e663a397facbc00
214 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains multiple embedded URLs, with a critical heuristic firing for a link to known malicious redirector infrastructure. Another critical heuristic indicates a PDF link farm, suggesting an attempt to distribute further malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://cctraff.ru/123?utm_term=osrs+kbd+guide+ironman In PDF document text
    • https://static.s123-cdn-static.com/uploads/4496381/normal_5fc4326f1cc94.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490529/normal_5fc201533b86a.pdfIn PDF document text
    • https://pigamudabuv.weebly.com/uploads/1/3/4/2/134235231/4227928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455377/normal_5fbf36c71cee0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411231/normal_5fc4b8a68f161.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fa45648a7d5a.pdfIn PDF document text
    • https://jurujixomegisi.weebly.com/uploads/1/3/4/7/134745805/dobuverenevonas_vipurerotu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rutojo/12587246452.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc57951239b0722915020fe/t/5fd0f3dc89aa3c2157eb377a/1607529441148/chikungunya_sintomas_iniciales.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/old_man_down_the_road_tab.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc55b71e2fce462bca9984b/t/5fc9764d19890c408b2043dd/1607038543433/vibuworudimi.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/calor_asfixiante_richard_castle.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/83303424130.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/automatic_car_parking_system_project_ppt.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_off0001cebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEBC 5344 bytes
SHA-256: 040c8f5fe2f389c38ba8df24104540caf6ad5e11a509e523af3a94ae717705e2
font_01_sfnt_off0001e0c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E0C4 11388 bytes
SHA-256: f2b678641c3f319b335aedaed124cc2560fc97662794ebbbd885aa2ce378d8e8

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