Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f39989b514a1e6f…

MALICIOUS

PDF

82.1 KB Created: 2020-11-26 07:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8e032a3d5ec0e97f31c2294314546975 SHA-1: 61a11d4f05ad2c1c563dd72c04bded041e3fb78a SHA-256: 8f39989b514a1e6f5215f35d1474a2dace97bffccb0364cc5ff1086fcbd41a62
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=san+agustin+colombia In PDF document text
    • https://cdn-cms.f-static.net/uploads/4421218/normal_5fab9d039f5de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403679/normal_5f9cb146dc951.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375504/normal_5f95862aa25bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409619/normal_5fb534f60e97b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/bidurudilidujug/chapter_9_study_guide_world_history.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea7b43c5-2d25-40ad-9d92-0c5d8b7396dd/79035941676.pdfIn PDF document text
    • https://s3.amazonaws.com/tarajix/46038076375.pdfIn PDF document text
    • https://s3.amazonaws.com/juzalizuvar/varuz.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/historia_de_la_apicultura_en_colombia.pdfIn PDF document text
    • https://s3.amazonaws.com/zalisujezajaje/material_design_admin_template_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/school_magazine_cover_page_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce98f6e6-ab36-4a70-9530-35c29e87dab2/femizo.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/ss_bat_ki_full_form.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ec54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC54 2968 bytes
SHA-256: a3409f23d318cb64f50816b13ffa5e4cae8c31e9b9ecf1c6aab81bc325688a60
font_01_sfnt_off0000f6f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F9 5028 bytes
SHA-256: 702820b6c44985c7a6e2ec21d2bb5784e087a1002e7c2d0f92da465fcdc4cb9f
font_02_sfnt_off000107f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107F2 10972 bytes
SHA-256: 5f30a82eb854fdf2904f9dd713e5931726b10a0d86871fede808d19172d5464d
font_03_sfnt_off00012bc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC4 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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