Malicious PDF — malware analysis report

Static analysis result for SHA-256 e675291efe01e8b0…

MALICIOUS

PDF

68.5 KB Created: 2020-12-19 01:45:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: de6d9e7d0ce44eda0e4bb167b26bd511 SHA-1: bf2f11ace0a612a4cea31a73454642db2200d1d6 SHA-256: e675291efe01e8b046f5e9738fedf0650d6bf7feb041de2ea531c6619298f966
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://trafffe.ru/123?utm_term=how+to+install+rudy+enb+2020` suggests a phishing or malware distribution lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a common phishing or malware delivery technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffe.ru/123?utm_term=how+to+install+rudy+enb+2020 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4405902/normal_5f95535a64f95.pdfIn PDF document text
    • https://gegixigozazewit.weebly.com/uploads/1/3/4/8/134858275/1dc14be3b041.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/f13c2c.pdfIn PDF document text
    • https://keminozabigorez.weebly.com/uploads/1/3/4/8/134886120/kakatigi-tadubutib-mawolos-basexigawe.pdfIn PDF document text
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/pepifotexij-wurukuleka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383445/normal_5fbf2608dd3cf.pdfIn PDF document text
    • https://nuralizowipu.weebly.com/uploads/1/3/4/6/134693001/fdfd5896bf0400a.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/dukexajuj/zululiwisuve.pdfIn PDF document text
    • https://s3.amazonaws.com/henghuili-files/vibifabow.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/kovawumemopevad.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_off0000ccbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCBF 5388 bytes
SHA-256: cba7cda514112012741fd07036f9fc83f15498370f93e91846407b420167a27a
font_01_sfnt_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 11120 bytes
SHA-256: be63c45f868762f2f21cc3247e469d80a304bdbd31e8946bfbb539b3037b9713

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