Malicious PDF — malware analysis report

Static analysis result for SHA-256 45c353d0cf1551bb…

MALICIOUS

PDF

64.7 KB Created: 2021-02-22 12:16:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: dfda0704cb75f9fa9e61d03857f92719 SHA-1: d40d03631329928a1ca2c3db3885968b2ef726ad SHA-256: 45c353d0cf1551bb9da912b8624d057a0fd1fcffc05ae7eb75ad99091185ce0e
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'seumenha.ru', which is likely part of a phishing or scam campaign. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious site, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://seumenha.ru/strik?utm_term=how+to+unlock+craftsman+garage+door PDF link annotation
    • https://cdn.sqhk.co/sarafogu/jfhjjiE/block_puzzle_jewels_world.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_603368b667a03.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/FfVhjjc/free_kicks_in_football_history.pdfIn PDF document text
    • https://cdn.sqhk.co/lajefage/hTY3Mha/90748836931.pdfIn PDF document text
    • https://cdn.sqhk.co/pafevola/p5ib8he/xazavad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490950/normal_6000901032944.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488323/normal_5fef690a0007c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446931/normal_603001a6e28ba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446915/normal_600f5be0250a4.pdfIn PDF document text
    • https://cdn.sqhk.co/desixurate/bpgj7gc/60082793565.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/1lejgij/67905615370.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/jimugivos/aged_care_guide_vacancies.pdfIn PDF document text
    • https://s3.amazonaws.com/tenunud/android_model_to_jsonobject.pdfIn PDF document text
    • https://s3.amazonaws.com/dexodekelaseki/barber_pole_vector.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_off0000c114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC114 5456 bytes
SHA-256: 2a9eff41d731fc25c8591f62c405050527c4be0de8d208d8a96c704a6054af10
font_01_sfnt_off0000d3a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3A0 10068 bytes
SHA-256: ae50c40d0c5ed82e029c9d6ffcc29777c46895eff4f336daab466f1b7fc09308