Malicious PDF — malware analysis report

Static analysis result for SHA-256 c16e0efc0bb78835…

MALICIOUS

PDF

61.0 KB Created: 2020-11-13 00:26:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d14fcad761651434b2464add6e0c0aab SHA-1: db246cec2949d91f0b3f6656f69024e01877922b SHA-256: c16e0efc0bb7883566b1376f1381735644df4358a7264c8cefba4195d8df13d2
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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=waxing+the+city+dtc In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f9c7b73e521e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417123/normal_5fadb495bc64d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393220/normal_5fabc43da570d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367299/normal_5f875460bb08b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370267/normal_5f8aa0624d9ab.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/b112013e-41d1-4598-a870-9ddda0675cfb/lurebi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/625ff1b2-cdd3-4a8d-a411-b4062aa51a0e/14755634350.pdfIn PDF document text
    • https://s3.amazonaws.com/kulinisokakewi/nero_human_form_black_clover.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/be69ddfe-236d-405b-b836-e623e4ae1e67/17010484129.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b650fc-c097-45cb-9446-953d22fefb1b/libadukebepub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40732af9-ef75-4a2f-ae05-95d3a74c9f76/9th_wedding_anniversary_gift_hallmark.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e88fe28-3a10-4413-80f8-7c1ea593abcc/11315489149.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_off0000b0e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E9 5076 bytes
SHA-256: 74785fdde483424ebc61e09eb9ef73cd1da02e56d2810ab5922d3618787ae432
font_01_sfnt_off0000c247.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC247 11184 bytes
SHA-256: e1fea42a1a1b03fde947f81749af4ee766afaabc311b56d190e4390450b5cc0c

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