Malicious PDF — malware analysis report

Static analysis result for SHA-256 c89875077cdc6e1f…

MALICIOUS

PDF

62.8 KB Created: 2020-11-29 16:36:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 065baaeeeccff2204a22ad23cf2a4f7b SHA-1: de79b836d393cdecc73cec1df98c1b2b8d5a04d6 SHA-256: c89875077cdc6e1f67f02209aa153aeea96d7f444527b050f01c192433943af8
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 0.9998

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://cctraff.ru/123?utm_term=what+is+a+factor+market In PDF document text
    • https://cdn-cms.f-static.net/uploads/4459937/normal_5fc251b6bd966.pdfIn PDF document text
    • https://xalogajufuzuk.weebly.com/uploads/1/3/4/8/134885017/71f7bd2.pdfIn PDF document text
    • https://zepinimokibe.weebly.com/uploads/1/3/4/3/134373719/pelupufiteter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472198/normal_5fad711462ed0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475985/normal_5faa100b12599.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6de1f6a3-f20d-48a5-8daa-3d54c926fcf7/tales_of_zestiria_sanctification_gui.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/bonaire_durango_evaporative_cooler_4500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca561e4f-b6af-4d32-8d55-2cf3b8c4079a/zepumotalabubexosom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f8680d-1483-433a-ba5a-7aa026b69cc8/industrializacion_de_produtos_carnic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39a160d4-cf35-4c5c-9a75-75ff307c05a6/90454257538.pdfIn PDF document text
    • https://s3.amazonaws.com/kosamupim/maplestory_m_armor_guide_reddit.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/turivizizowevuniremim.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_off0000ba19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA19 5168 bytes
SHA-256: 6470cb9ba3b2fdd0c8fcf5a23c82a845f1a9141c9351f99715e8ec0deed0872f
font_01_sfnt_off0000cb8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB8F 10420 bytes
SHA-256: 38f8e2d5bd9efc2d3ff8b2c62b9d3d68373fe7cfa6636de42090fb69255ace0e