Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a899937ec9203a…

MALICIOUS

PDF

82.7 KB Created: 2021-02-22 10:47:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 979081abbe5435e65cc9c3950e638fcb SHA-1: 9e8010ab6d308ede7c80b0205fb541f962bff486 SHA-256: 74a899937ec9203a51957c2c30e942718faf060c44582918b3c8ea0d04c1d739
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, which is a common tactic for phishing and malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URL is likely intended to lead the user to a phishing page or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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.
  • 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=resumo+pequeno+do+livro+mem%25C3%25B3rias+p%25C3%25B3stumas+de+br%25C3%25A1s+cubas In PDF document text
    • https://static.s123-cdn-static.com/uploads/4411696/normal_6002b6a5b6b07.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369313/normal_60015da21a104.pdfIn PDF document text
    • https://cdn.sqhk.co/difixoruze/gdjcQjb/fashion_cartoon_character_makers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372361/normal_601bcfe49c67d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409998/normal_5ff339e23a03c.pdfIn PDF document text
    • http://leaninrzpd.site/format_code_html_javascriptf9cbc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464542/normal_5feb1c4a51bb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417813/normal_602caf4d4ead7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379229/normal_5fd77314b0e6e.pdfIn PDF document text
    • http://dsv-trening.ru/ielts_writing_sample_papers_with_answers1jbob.pdfIn PDF document text
    • http://naturebiolog.space/xuwanodekz5o1p.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
    • http://pepudujer.epizy.com/ariston_cooker_hood_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/mujesogi/wastewater_treatment_project.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/asbestos_cement_corrugated_sheet_removal.pdfIn PDF document text
    • http://kidojudal.epizy.com/bad_company_song.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/haier_portable_air_conditioner_not_heating.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_off0000f38d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF38D 5804 bytes
SHA-256: 30c779c2bfb8f65f7a108dcc019960d849c6f97ae2254729ef919adadea6587f
font_01_sfnt_off00010654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10654 12400 bytes
SHA-256: 1972ed13164a90c1814a16279fe7966b5061b2be4299aca83a0f343814dd1f03
font_02_sfnt_off00012c3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3B 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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