Malicious PDF — malware analysis report

Static analysis result for SHA-256 b52789b8b0ba5fb2…

MALICIOUS

PDF

83.0 KB Created: 2021-01-08 15:55:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 19707b3e787fa2eb187d77a0d8252dc6 SHA-1: 32a3c3876e690afefeb9950f03d2b51f7057772d SHA-256: b52789b8b0ba5fb2ec55bfce1ffd19ecac8665a12ec5c5b488f98825186a8302
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 0.9832

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://trafffe.ru/aws?utm_term=where+to+buy+linen+sheets+near+me PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385850/normal_5f9261fe6b704.pdfIn PDF document text
    • https://cdn.sqhk.co/raninogozo/iJvxjex/copper_price_chart_live.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494417/normal_5ff50cc282054.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380393/normal_5f8b33356e518.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378836/normal_5f90c988c5cd5.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/febce951-5bae-4d10-bfd0-5781b6161f72/jirajosuzibuba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8dcdf4f-749d-4c81-95d1-8cb3b7b29eb0/salt_and_sanctuary_stone_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/330b1c81-a2a7-47fe-b8a3-8d69d740e87b/dewed.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_off00010847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10847 5180 bytes
SHA-256: 18299dae2f12d56dba7c6210f0bded624b0b49426dc6ee5212cf0d4f72da7db5
font_01_sfnt_off000119ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CA 10944 bytes
SHA-256: 2b7e86e1f06e51f646418134fd0b69205d54fb64c197f0ffe732a26f114fc48c

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