Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d8449ca806870b…

MALICIOUS

PDF

61.5 KB Created: 2020-12-02 13:41:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3cff5d1acf973ebca69ea0686d4216ae SHA-1: bc1aab8763fcc9029a8d660d5bf44e8de1be9ae3 SHA-256: b6d8449ca806870b8054825c0725a771e92674fc5c2128eca5b0e3c415e63280
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://cctraff.ru/strik?utm_term=how+to+survive+and+maybe+even+love+nursing+school In PDF document text
    • https://zozovuxogufeduw.weebly.com/uploads/1/3/4/7/134766710/8264973.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370286/normal_5f88f3f3d651f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc58f801452f90b7f04b470/t/5fc633dea97599144ecc7e96/1606824945188/golf_orbit_mod_apk_latest_version.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/attention_to_detail_aptitude_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3143c84f-05a8-4652-be3c-75d36c7e4aaf/65436272940.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/32471940013.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ac61d56-f8bc-47b8-af7b-83e85cb4f6f3/los_numeros_en_ingles_del_1_al_100_para_ninos.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4cad1f7cf8c754043c6f3/t/5fc7749c93ad1a48121d0f15/1606907036871/17147278554.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f952419-9752-4fd4-a587-2eeec7cfc1bb/vabafowol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d78249e-ee30-4724-8a6e-c95241ee8cb7/cool_text_generator.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_off0000b317.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB317 5708 bytes
SHA-256: cd32035147bd97f0aad6cb2276650eb0f2b54bd078952f3f40b9424824b722a3
font_01_sfnt_off0000c672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC672 10172 bytes
SHA-256: ffc5131cfe864e5ac1b8a8352f727e5035d163345733709d5b9a11224d55e5de