Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23d1df9c84668cf…

MALICIOUS

PDF

66.0 KB Created: 2020-12-19 15:08:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: b849447b6b43b9cb1bd83caa485b2589 SHA-1: 292bfece37b713e9c130b6e7486b26f90a76cfbe SHA-256: e23d1df9c84668cf327c4b2ade13bda853dd07ddab76071f19672aedc56fc6ed
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classification and ClamAV, with a specific ClamAV signature indicating it's a phishing trojan. A key heuristic firing points to an external URI, 'https://trafffi.ru/123?utm_term=grit+to+great+pdf', which is likely the malicious destination. The PDF structure and embedded content suggest it's designed to trick the user into visiting this URL, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://trafffi.ru/123?utm_term=grit+to+great+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407991/normal_5fbd71a9dd256.pdfIn PDF document text
    • https://duzozerijadid.weebly.com/uploads/1/3/4/4/134493401/zozud.pdfIn PDF document text
    • https://kutowovazamil.weebly.com/uploads/1/3/4/3/134362820/43e233f.pdfIn PDF document text
    • https://bivilasafufi.weebly.com/uploads/1/3/4/6/134689398/8071200.pdfIn PDF document text
    • https://gedevuxezupimot.weebly.com/uploads/1/3/4/8/134884710/pajidisave.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/visagogijulep/asphalt_pavement_design.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcead99174f5d42db91d679/t/5fd6375dffab5d3c56f45265/1607874398049/smart_choice_2_answer.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd3a8a51e6b539731b098d/t/5fddedc87514fb3b76378fcb/1608379851896/duelyst_wiki_guides.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5141627a199023ad05ad4/t/5fc6562c4f98375720b6da2b/1606833708253/soccer_star_2020_mod_apk_unlimited_gems_download.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_off0000c771.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC771 5032 bytes
SHA-256: c0eed3b30f13b1ca37cd3abf8e74ab1483e64e922928b4c6c7901a2519c3493b
font_01_sfnt_off0000d8a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8A6 10244 bytes
SHA-256: 643fa37550d94f1c76b8cf3c3848c690a3a749b37ca0720088121ad457e21753