Malicious PDF — malware analysis report

Static analysis result for SHA-256 a56fe4bd3c0d24cf…

MALICIOUS

PDF

77.3 KB Created: 2021-03-12 10:08:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 8cd98244b591f40592f66c35ebc4ac85 SHA-1: 32f3a567f89949b9fac3a04f6418f86d9de6527d SHA-256: a56fe4bd3c0d24cfbc27369207ee4d225107476c6646a13eddd0342e0666df16
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. The document contains an embedded URI pointing to 'xajibur.ru', which is likely a phishing or malware distribution site. Although the document body is heavily obfuscated, the presence of the external URI and the overall detection verdict strongly suggest a phishing attack pattern.

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://xajibur.ru/strik?utm_term=dell+optiplex+790+power+supply+diagnostic+button PDF link annotation
    • https://zesawomu.weebly.com/uploads/1/3/4/3/134321331/94f67838acd73.pdfIn PDF document text
    • https://fugowekarulosom.weebly.com/uploads/1/3/4/7/134700114/fifatitugikoporapuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497075/normal_60396a99a520f.pdfIn PDF document text
    • https://cdn.sqhk.co/bekutojeke/ia1idhc/72126174804.pdfIn PDF document text
    • https://cdn.sqhk.co/birenejar/gMQwjgc/jump_rope_or_running_for_weight_loss.pdfIn PDF document text
    • http://fagilef.getenjoyment.net/cambridge_english_empower_pre_intermediate_student_s_book.pdfIn PDF document text
    • https://cdn.sqhk.co/mebosuxular/R9gcidY/gekorezutojevineson.pdfIn PDF document text
    • https://cdn.sqhk.co/jeporikate/S1fjcgc/slingshot_rental_chicago.pdfIn PDF document text
    • https://vakasuvarepem.weebly.com/uploads/1/3/4/3/134328097/supawuti_vidixezusaz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428052/normal_5fdff27e2b411.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tafiwepamubov.atwebpages.com/graco_duetconnect_swing_and_bouncer_batteries.pdfIn PDF document text
    • https://s3.amazonaws.com/jakujakula/netflix_for_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/zatasipezeg/robasisinomojale.pdfIn PDF document text
    • http://ramawotinejog.epizy.com/flame_test_lab_analysis_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/chrome_extension_network_error.pdfIn PDF document text
    • http://ketonabewuzove.epizy.com/cual_es_la_estructura_de_un_texto_argumentativo_yahoo.pdfIn PDF document text
    • http://zitulogakapede.myartsonline.com/denosiker.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/zaxowuletatafabetapiv.pdfIn PDF document text
    • https://s3.amazonaws.com/wovisak/padanovitogi.pdfIn PDF document text
    • http://nolivajujereram.rf.gd/36539518121.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_off0000ede4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE4 6020 bytes
SHA-256: 031c124434c4682cc18b33cdbd63bf296d805912a70dda6fb553c892a4bed8b9
font_01_sfnt_off00010293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10293 10776 bytes
SHA-256: 6d821f4955573819c6066c28308257c61df06ef202ef8157b83ea8958f72f28f

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