Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d2f702a947c2fcd…

MALICIOUS

PDF

95.7 KB Created: 2021-03-06 01:52:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: bbf4a2a1b83a983e418f70ba7bd4c672 SHA-1: ed0bb47b21d710fc7e2bfc2a6c961f058b35ad1d SHA-256: 8d2f702a947c2fcd67b9ec5ac88319fd0acf5fa3f04e4b1af4d3cf01bf0b2e4b
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to disposable hosting and are likely part of a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest it's designed to lead users to malicious websites, potentially for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xajibur.ru/strik?utm_term=what+is+statutory+maternity+pay+for+self+employed PDF link annotation
    • https://lafevisok.weebly.com/uploads/1/3/2/6/132683062/wozisotibizu-bipabazisura-vukatibexixul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483388/normal_60261a26e8124.pdfIn PDF document text
    • http://pro-konditer.com/visual_impact_muscle_building4c3q0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407807/normal_602116ba33666.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369142/normal_60419e15c8d54.pdfIn PDF document text
    • http://microbladingcertificationdfw.org/76830320275mqxtd.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/6293961.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403130/normal_5fca229c26ec1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498678/normal_5fe5fc8eb35b4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417220/normal_60095aeb39787.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388279/normal_5fc99627dfbbc.pdfIn PDF document text
    • http://abanca-electronica.com/the_flow_on_audiopkj2i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385436/normal_5fdc12b2cb764.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/fosalizuzu/33513006255.pdfIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/fusegelakixag.pdfIn PDF document text
    • https://s3.amazonaws.com/savifin/how_to_reprogram_a_clicker.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43fa2e0c-5b64-4f7d-992e-3091b30d6738/simple_compound_and_complex_sentences_worksheet_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/daxemo/hp_laserjet_p2035_printer_cartridge_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a32ed12-c513-45fc-9abc-f89474299673/dell_1905fp_driver.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_off00012a96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A96 5276 bytes
SHA-256: db21db7e9b4ce9287abb4dae0a740b0c2525f5963d90a27c18cac8d0f8c79889
font_01_sfnt_off00013c70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C70 11476 bytes
SHA-256: 2bbbd83cd39293fc1f5874eb483e9220f81749d5f865518dbd6dc09edf5247c7
font_02_sfnt_off00016362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16362 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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