Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00ba7d1a9e7a11b…

MALICIOUS

PDF

69.8 KB Created: 2021-02-24 14:36:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 6d82614a5715a5b954223a321caf4c2e SHA-1: a02bed2bcf6dd547e8c6c296729e219e776dd5ee SHA-256: c00ba7d1a9e7a11bfd9f861044018d56f44e2dcc8e45db23b538788ec0160803
184 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs pointing to potentially malicious or disposable domains, identified by heuristics like PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_DISPOSABLE_LINK_FARM. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the embedded URLs suggests the document is designed to redirect users to phishing sites or download further malicious content.

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://crophysi.ru/award?keyword=biome+world+map+coloring+worksheet In PDF document text
    • https://cdn.sqhk.co/terasovo/hbge1lQ/rampage_road_mod_unlimited_money.pdfIn PDF document text
    • http://idealica-italy.site/9135670063j2lbu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_600e59853be30.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486344/normal_6000a82886ea3.pdfIn PDF document text
    • http://winoraama.space/26072350436h0b2m.pdfIn PDF document text
    • https://cdn.sqhk.co/jefulajidi/cjg1Hhe/cooking_fever_hack_2020_iphone.pdfIn PDF document text
    • http://zotolowowomeve.iblogger.org/all_information_about_badminton_in_telugu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465388/normal_5fcfe9a5b6653.pdfIn PDF document text
    • http://bnl-jobs.com/sabrina_graphic_novel_downloadc0fcw.pdfIn PDF document text
    • http://fesetinidu.iblogger.org/pozesukupep.pdfIn PDF document text
    • http://registrat.space/90188897061cpfx0.pdfIn PDF document text
    • http://jilet2.club/82225828102zoyk9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/81014357833.pdfIn PDF document text
    • https://s3.amazonaws.com/bejexe/infectious_diarrhea_guidelines_philippines.pdfIn PDF document text
    • https://s3.amazonaws.com/likerajatob/antivirus_gratis_para_descargar_android.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7D0 5480 bytes
SHA-256: 6241090566c96af8e66b17bd6811683bfe510ffe833a7da2ce0f1518c85cdd37
font_01_sfnt_off0000da4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4B 9920 bytes
SHA-256: 2ebe31e851e2b36a18278ccfa2f491fb5ddade262bb9d58b8755991a9b933496
font_02_sfnt_off0000fc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC3E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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