Malicious PDF — malware analysis report

Static analysis result for SHA-256 657d154e1ba3a212…

MALICIOUS

PDF

64.9 KB Created: 2020-11-24 04:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0c69c83d16faa913eca5bd0d9d4b516d SHA-1: c310115523f765b8fc4758071bc4ef4b488681cb SHA-256: 657d154e1ba3a212b40c2f22ed2e89fb076f078176496c6bfbeb9133364c4179
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafftec.ru/strik?utm_term=devant+tous+je+m%2527+engage PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4489052/normal_5fb2f29d5ce45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408476/normal_5faefa59b7c03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425256/normal_5fa25d17747f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382418/normal_5f8f9adf63bd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371812/normal_5f8e3dd72d2e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9929ce4e-bd69-4dbe-a53c-06bd42f6abb0/4885645772.pdfIn PDF document text
    • https://s3.amazonaws.com/mupukesunobaga/basic_english_grammar_book_download.pdfIn PDF document text
    • https://s3.amazonaws.com/gelawiweza/kadudokiripuruwejimogoda.pdfIn PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/mukiv.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/jivitewanasu.pdfIn PDF document text
    • https://s3.amazonaws.com/wizuluworafid/severe_weather_worksheet_answer_key.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_off0000bca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCA3 5044 bytes
SHA-256: 4c63923552a5b0c96e9846edf28aad4974d13c79918a193c8c87f45f5f429f70
font_01_sfnt_off0000cdde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDDE 12836 bytes
SHA-256: d8d96d1470f4cf897fb26d5d2b23f31adde203d12fd215f2d5d6d5b999f67c3a

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