Malicious PDF — malware analysis report

Static analysis result for SHA-256 f558754f07551590…

MALICIOUS

PDF

64.1 KB Created: 2020-11-27 21:53:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8d910a04ffa2268ac1513fb99d512223 SHA-1: b92d6c0fa2f012afa9cdb163a187b903257b263a SHA-256: f558754f0755159065c7e195a3040d4e32b606cff387f77fe22677b1ac91347f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'https://trafffe.ru/123?utm_term=rikku+final+fantasy+cosplay', which is likely a phishing lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool sometimes used to create malicious PDFs.

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://trafffe.ru/123?utm_term=rikku+final+fantasy+cosplay PDF link annotation
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/6fc93ee18fa4.pdfIn PDF document text
    • https://sewuvemap.weebly.com/uploads/1/3/4/3/134377394/4211547.pdfIn PDF document text
    • https://bevokelas.weebly.com/uploads/1/3/4/3/134310014/fitozonok.pdfIn PDF document text
    • https://dexoxewivovevub.weebly.com/uploads/1/3/4/3/134322619/jalus-winawurofudijet-nilimog.pdfIn PDF document text
    • https://rikisuluwujufa.weebly.com/uploads/1/3/1/4/131452938/8346057.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/gavexilatuvitaz/43296608531.pdfIn PDF document text
    • https://s3.amazonaws.com/sabobenuwe/boiler_and_cooling_water_treatment_methods.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/xelir.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/mastering_the_8th_grade_social_studies_teks.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/646332e7-af05-4394-9616-e3361826a3f8/19557625562.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/ccrt_scholarship_form_2018-_19.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c08001d-9db7-43e4-b2ac-57280276c62f/padi_book.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/wuxaverelejunovifepefo.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_off0000c0c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0C5 5088 bytes
SHA-256: a657467237c252241f923c11462fe93f83f6ff55e9c777adb52e1ca138212cd2
font_01_sfnt_off0000d241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD241 9912 bytes
SHA-256: c8d436593a59d94b0fbcd9ae3faf9e3de67511ebd84346a77005b924956c9c28