Malicious PDF — malware analysis report

Static analysis result for SHA-256 b35dcce7d54c5e0d…

MALICIOUS

PDF

91.6 KB Created: 2021-05-24 02:50:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 4b315765a0a8a43b74355fd74fdb6745 SHA-1: 593b155a0a8f6612f6920542d154f46b1f63379d SHA-256: b35dcce7d54c5e0d67475cf7fcb52ba6056975cbbb1ad65fafc2b6025c89a1a1
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-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://vilenefex.ru/strik?utm_term=how+many+years+does+a+pre+employment+background+check+go PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467325/normal_604e1c189c19c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391599/normal_5fd610505f90f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5fd6fa623e1a9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470540/normal_5ff8993181370.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489983/normal_5fef9d441a871.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403266/normal_5ffc38e482b1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378608/normal_6052b521674bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378405/normal_601a1b52447ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_6065567400489.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/tubukeganuji/comentario_bblico_macarthur_online.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/breville_microwave_bre799gmsse_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/rutufokedizon/xubevubomazejubowizufoka.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/the_nature_and_origins_of_mass_opinion.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/lobozunurikukakugamibanaz.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/97287529504.pdfIn PDF document text
    • https://s3.amazonaws.com/kotidox/mechanical_engineer_jobs_in_indian_air_force.pdfIn PDF document text
    • https://s3.amazonaws.com/kevava/amityville_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/kavifunaruvi/rixotizipegabevo.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011b7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B7F 5848 bytes
SHA-256: 54315579bd50aeaf637caaed397c26befd562922e315aef1ec80dcae18ecf1f8
font_01_sfnt_off00012f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F40 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off000137ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CE 11432 bytes
SHA-256: 01336e12004d315bf815b5bfc1a290310dbb3f73839ccfe0ccd73af6ff044e7f

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