Malicious PDF — malware analysis report

Static analysis result for SHA-256 93031650d746f9c9…

MALICIOUS

PDF

77.2 KB Created: 2021-02-26 17:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: a12613ee42daca9876ec3a6be2b67400 SHA-1: 71e2f53abbc36c4edd49ccaabb15449b91db9ce9 SHA-256: 93031650d746f9c9363d4910877f733bc4acf9152f54e28cc4a80b2587012e1a
96 Risk Score

Malware Insights

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

The PDF file contains a lure related to 'Certified fire protection specialist exam questions' and embeds a suspicious URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site.

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://jacksth.ru/strik?utm_term=certified+fire+protection+specialist+exam+questions PDF link annotation
    • http://borezopesane.22web.org/vusovedekita.pdfIn PDF document text
    • http://gudelew.mywebcommunity.org/dikokokewolotunawesi.pdfIn PDF document text
    • http://walkover.me/business_income_coverage_form_definition33ftf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376856/normal_601ff8a16dfa7.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/total_gym_tv_discount_code.pdfIn PDF document text
    • http://madusotiju.22web.org/esposa_ou_amante.pdfIn PDF document text
    • http://crispyset.online/the_four_fold_waypkd24.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/buwosevax/sofatofibija.pdfIn PDF document text
    • https://s3.amazonaws.com/lijulijowivaze/normal_12_lead_ecg_report.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/answer_the_question_in_spanish.pdfIn PDF document text
    • http://sebixadasejevu.rf.gd/bovop.pdfIn PDF document text
    • http://zarevamemamafo.rf.gd/75939615866.pdfIn PDF document text
    • http://tarobajasupimi.epizy.com/48231078393.pdfIn PDF document text
    • http://luvabokinoleg.onlinewebshop.net/10537073977.pdfIn PDF document text
    • https://s3.amazonaws.com/daraniwekamidir/1112522549.pdfIn PDF document text
    • http://wesaxerofirivo.epizy.com/second_law_of_thermodynamics_derivation.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_off0000f0ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 5400 bytes
SHA-256: ca21b010ad54c6b0f5b299f0d8c571b78ab8ad7a40defde9a20acf63bb432836
font_01_sfnt_off000102f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F9 10752 bytes
SHA-256: e168dd84daf5346305fa148654014858abcf0d446360d5fe634e8252d8a00457

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