Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b8dfa4600154e2b…

MALICIOUS

PDF

89.8 KB Created: 2021-02-22 08:39:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 5c908f25306378d4df14a3001dd403f0 SHA-1: dd137f8f48cd21e447481739d32a855dfe4fc095 SHA-256: 5b8dfa4600154e2b77d86a3211222f4e3cbe71885519a25fd51215a85b420f4e
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URIs that point to external websites, suggesting a phishing or credential harvesting attempt. The presence of these external links aligns with the Spearphishing Attachment technique, as the PDF likely serves as a lure to direct users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/123?utm_term=dr+seuss+book+list PDF link annotation
    • http://gaydating.world/jabra_step_wireless_earbuds_blackusbs9.pdfIn PDF document text
    • http://fbdirect.site/xirumadsr1h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5fdd41803641a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454681/normal_5fdf9c2ea91eb.pdfIn PDF document text
    • http://torevifij.iblogger.org/70842921998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418746/normal_602fdbb78e8eb.pdfIn PDF document text
    • http://natalifu.22web.org/17003067919.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4394073/normal_5fde888142781.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476924/normal_601bcf44e3641.pdfIn PDF document text
    • http://luvatok.66ghz.com/nofatolorexomomobiwanom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393641/normal_5fcbc92fe22a3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411503/normal_5ffcd42b1a522.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466408/normal_60038e50aea72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416919/normal_5ffccd0a3629e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467576/normal_5feafe2243f6e.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/40799165118.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dilipomijovum.epizy.com/bovez.pdfIn PDF document text
    • http://nalafovop.rf.gd/kerazevokekolo.pdfIn PDF document text
    • http://lezuwibo.rf.gd/jalatipaxexunasujovadoba.pdfIn PDF document text
    • http://jaxojuruwak.rf.gd/38765942789.pdfIn PDF document text
    • http://tifureboriva.epizy.com/18994525651.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_off000122dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122DD 4672 bytes
SHA-256: fc2321acbbfb29957d3707c98c922d0b861938f908991f2ddaad751d513dc296
font_01_sfnt_off000132d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132D8 11744 bytes
SHA-256: 23edddb309b2694015e316e583485652318ec7dc379515883227ad49f72bc2a3

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