Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b8c66cb5a080beb…

MALICIOUS

PDF

73.9 KB Created: 2021-02-25 20:52:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ff7abf1e63bd2a3332580b802d88502e SHA-1: 75f88a794e4d96a3f30d1bfbd0a52546be0d0270 SHA-256: 6b8c66cb5a080beb1b7e4a7813ffad909dfda927feef41c16d34d08833b4bd0e
154 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, which is designed to lead users to phishing or malware sites. The embedded content, though heavily obfuscated, suggests an attempt to disguise the malicious intent. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 4

  • 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.
  • 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/award?keyword=how+much+is+a+long+haired+dapple+dachshund In PDF document text
    • http://kasyanbeauty.com/molecular_biology_of_the_gene_worksheet_answer_keyal4qg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419412/normal_5fdc4ecc64a9c.pdfIn PDF document text
    • http://soul-felt.com/business_partnership_deed_format_in_banglacfi13.pdfIn PDF document text
    • http://lebizifijafaxim.medianewsonline.com/87839196492.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377410/normal_5fcdcea6e50d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421366/normal_5fd7eb1915e1e.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/rovuweraja/busodededujonajofujado.pdfIn PDF document text
    • http://fuvuvadut.onlinewebshop.net/vector_addition_and_subtraction_worksheet_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/annual_report_apple_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/vokegakerutemubut.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/cfpb_complaint_template.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/soya_bean_production_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/ingilizce_zt_anlaml_kelimeler_listesi.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/wewefepip.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/what_is_coding_simple_definition.pdfIn PDF document text
    • http://nuxijezusuwep.rf.gd/hp_elitedesk_800_g1_twr_pci_serial_port_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB69 5540 bytes
SHA-256: 3e93626474c74dcc86bfca92b96d164b5246637739297ef620990d0cabcf6ff3
font_01_sfnt_off0000ee23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE23 13560 bytes
SHA-256: 00c4985e53868055ab45dfd23dd4f7023c98983a783cfcbb6e8a1b5995da5858

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