Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d50cc25bf6c0162…

MALICIOUS

PDF

70.0 KB Created: 2021-01-16 14:23:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 80f270be0151bfc7db53a101385a7b76 SHA-1: 9b700a8ad21245c1be9bbf00fa7c695538006407 SHA-256: 7d50cc25bf6c01629103a918480349de2119b7cbe498f56b4847ce86a99c70e8
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 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/aws?utm_term=avg+free++full+version+offline PDF link annotation
    • https://cdn.sqhk.co/mewowoji/jiVjcgi/sefegufopo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401697/normal_5ff4eeb0b4afd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375070/normal_5f894a41432ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386337/normal_5f9448a6de272.pdfIn PDF document text
    • https://cdn.sqhk.co/woxipepevati/egdiidr/93762755569.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479932/normal_5fdd40daadcea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367648/normal_5f9af1f67e7d0.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/litunux/89009509138.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/gerirosaxizubu.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/jubirevesifixeropuliw.pdfIn PDF document text
    • https://s3.amazonaws.com/fomudebipefasu/39510515799.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_off0000d561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD561 4776 bytes
SHA-256: e7bc3624ada8e536eb34c77770cde2bcf6b9f6e93ee1393acec47fb56c3d9f0f
font_01_sfnt_off0000e5c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C4 10632 bytes
SHA-256: 31eedb4f5a998d4cffd921143ff1420bb48394098e6ab272b3e4b50bac84a4a1

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