Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c638d8b33949851…

MALICIOUS

PDF

68.5 KB Created: 2020-12-17 11:50:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 159d2b984b54a3ef17fb73f50d928940 SHA-1: 72b58311ff2f3c5f4934403c2d046928d5db7669 SHA-256: 6c638d8b33949851717b7b1401a63179fe70ee09ff48c73d7eaddc82188c2ba6
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to known malicious redirector infrastructure or are part of a link farm designed to manipulate search engine results. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, contains a product search term, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=mens+overalls+shorts+for+sale In PDF document text
    • https://cdn-cms.f-static.net/uploads/4409627/normal_5fa3770f97158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418579/normal_5fa63d2ab73fc.pdfIn PDF document text
    • https://tamukatiraf.weebly.com/uploads/1/3/4/7/134766395/12ef11013eb9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_5f87248f268ef.pdfIn PDF document text
    • https://fomukudir.weebly.com/uploads/1/3/4/4/134403856/ludeluxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fba775f24b7b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386333/normal_5fb6a63498120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385204/normal_5fa170ccad750.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472764/normal_5fa52a1e50cdc.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/5fc35e67cd1e280355e3f728/t/5fcb6d3564036b61438d1020/1607167289457/are_ms_state_parks_open_for_camping.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd3246dacccf6c5ce66c6e/1606234694504/modeling_the_phases_of_the_cell_cycle_worksheet_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2ba66a5bc066edfb17265/t/5fd06e0a89fd2c07d10327e7/1607495180808/hachiya_persimmon_cookie_recipes.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0dde4403f5353fd9590af/t/5fc50e996457125654dba270/1606749853134/fupodatitewobaminit.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_off0000d230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD230 4920 bytes
SHA-256: 54c50ccdac1426d7303774b2fa029a061180160554aae167e72b68f6792515e5
font_01_sfnt_off0000e2f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F5 9924 bytes
SHA-256: 17ebb9e2dc48052d503451e3bf8e7f9751c3dcfb22bef6d234bb26a4ac4e2681

Open this report in the interactive analyzer, or submit your own file for analysis.