Malicious PDF — malware analysis report

Static analysis result for SHA-256 09f8cc1c628df7f7…

MALICIOUS

PDF

63.6 KB Created: 2020-12-09 19:27:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c130e03dd7fa347b5f9b8dc20fcd9b5f SHA-1: 18d7017dffda398408cb78707886cb71307429bc SHA-256: 09f8cc1c628df7f7db723ff11bc0b2f2dc72deab1c9210327292c4078bf2fe22
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier and ClamAV detection also strongly indicate malicious intent. Although no scripts were extracted, the presence of a malicious URL disguised as a book title suggests a phishing or malware delivery attempt.

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://traffine.ru/123?utm_term=el+martir+del+golgota+libro+completo In PDF document text
    • https://zizeximafebofiz.weebly.com/uploads/1/3/4/3/134369397/9924caacaf88e.pdfIn PDF document text
    • https://naxizugopigonav.weebly.com/uploads/1/3/1/4/131408516/taget.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390052/normal_5fba8ef41be28.pdfIn PDF document text
    • https://vefawedufuzagi.weebly.com/uploads/1/3/4/7/134718770/rugogesosuli.pdfIn PDF document text
    • https://jazafojof.weebly.com/uploads/1/3/4/3/134310209/gejowopoz-zamize-wiwilofi.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/mokuwanibof/fuller_libro_de_instrumentacion_quirurgica.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd40802de71506718c4d3b/1606238336667/72436323690.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3624192c50b1a1e875bab/t/5fce47fa260a660a6b08d6e6/1607354362220/pentagon_kpop_best_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/liniwoxuvuredesefinepu.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/the_queen_s_gambit_book.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_off0000bd03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD03 5312 bytes
SHA-256: 3df82776932e3bfec7d91c0dc0fef94b429db1b096213a0c257286bf7e87d992
font_01_sfnt_off0000cef2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEF2 10816 bytes
SHA-256: bad2d048c18ca4c8127a68b9855595f7b6eb631c8f9d1d1147deff999bdef495