Malicious PDF — malware analysis report

Static analysis result for SHA-256 80a94a914469ad6b…

MALICIOUS

PDF

67.1 KB Created: 2021-02-16 11:41:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0c314dfb27a6fda1b9469f239dac0128 SHA-1: 5f46448137a6844887e21333b3b78bbd2b16e676 SHA-256: 80a94a914469ad6ba915c27cee1d9cf87895eac401d5d8535ea5c98f05b884f9
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The embedded URL `https://crophysi.ru/123?utm_term=asus+rt+n66r+firmware` is identified as a primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious URL strongly suggest a phishing or malware delivery attempt, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://crophysi.ru/123?utm_term=asus+rt+n66r+firmware In PDF document text
    • https://cdn.sqhk.co/xonepogafix/ohikwYa/97220676719.pdfIn PDF document text
    • http://wiwexar.22web.org/laxup.pdfIn PDF document text
    • http://lg-copyrightforms.com/rad_grade_5_ballet_musicimh3g.pdfIn PDF document text
    • http://sijojovimem.22web.org/taxir.pdfIn PDF document text
    • http://wowosuseje.22web.org/service_electric_cable_guide.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/tinezedu/2744942339.pdfIn PDF document text
    • http://sozogakuvigoxev.epizy.com/wd_my_cloud_pr2100_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/47248587718.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/beclomethasone_inhaler_davis.pdfIn PDF document text
    • https://s3.amazonaws.com/jevopemosod/incident_report_sample_security_guard.pdfIn PDF document text
    • https://s3.amazonaws.com/gidibesuxi/car_setup_guide_assetto_corsa.pdfIn PDF document text
    • http://xatabiraluxuded.rf.gd/nezaf.pdfIn PDF document text
    • http://mamaliloseda.rf.gd/pedajapefopixo.pdfIn PDF document text
    • https://s3.amazonaws.com/gekixadonuru/figubotewuda.pdfIn PDF document text
    • https://s3.amazonaws.com/xotomisen/reaction_mechanism_of_alkanes.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_off0000c922.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC922 5116 bytes
SHA-256: d8f2da30d0d979e1957499b88be794d34ecc683416b542b11c2192b8fba22a1c
font_01_sfnt_off0000da82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA82 10972 bytes
SHA-256: 914bfcf6c260002722a635876ecb56dda1988975d65e062abf935c2bf92c442d

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