Malicious PDF — malware analysis report

Static analysis result for SHA-256 0256cfb5f49ec433…

MALICIOUS

PDF

64.3 KB Created: 2020-12-17 21:59:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d04180dc993dc940a61197ac7f6e62ad SHA-1: 7056fed2ff01480cb86598b50610cdb3ca8522d7 SHA-256: 0256cfb5f49ec4330ec92bfedaa052bc67c2685a67f730246cbfe59975d01153
214 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics, including PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM, indicating it contains numerous links to external resources. The ML classifier and ClamAV also identified it as malicious. The embedded URLs suggest a phishing or link-farming scheme, likely designed to redirect users to malicious content or exploit search engine optimization techniques for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffine.ru/aws?utm_term=chiltepino%2527+s+pabell%25C3%25B3n+reforma+hermosillo+son In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366048/normal_5f8710c13aa44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390055/normal_5f91c7ede7982.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417656/normal_5f9a765731938.pdfIn PDF document text
    • https://bamojatiw.weebly.com/uploads/1/3/4/6/134699288/jepiboxuveti.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386335/normal_5fc3974dbde76.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448341/normal_5fbc7425b903c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500893/normal_5fd3104fbb4e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410415/normal_5fab6f373527e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481162/normal_5fb833196ded2.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/vukumesoj/23848486237.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/excel_vba_set_variable_as_sheet_name.pdfIn PDF document text
    • https://s3.amazonaws.com/rizijubovapuk/addition_math_sheets_for_1st_grade.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_off0000bc20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC20 5356 bytes
SHA-256: ed726e215c5576f8d02104b9980a118a9d7e11af2adc17df5fb20f6c9f2ce366
font_01_sfnt_off0000cde9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE9 10808 bytes
SHA-256: 7142eb6046345d8ab63c727e17b4b29af97b5c55ded869868a706234e7059f99

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