Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7682bbd117cdb1b…

MALICIOUS

PDF

69.4 KB Created: 2020-11-18 12:24:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 28e6d238624deedc577a292b4e69043e SHA-1: b72c299c5ccdd264a911733c3dfc5d03efb09395 SHA-256: e7682bbd117cdb1b529ad2d60009e50e2d76ff3c1e81973a1b366ceda4ce3466
156 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 a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=cbr+reader++windows PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4410722/normal_5fa7329e10f77.pdfIn PDF document text
    • https://gejatovuri.weebly.com/uploads/1/3/1/4/131406669/4137779.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/55585c9a-3a8d-45bc-8528-3d7b0fe1f6a3/24641291584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f80df5c4-2856-481c-947f-e33d4049892f/36964218433.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/88024377020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/886b294d-6b6a-4d11-96f0-892876da5f04/volvo_xc60_hybrid.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/gin_rummy_mod_apk_android_1.pdfIn PDF document text
    • https://s3.amazonaws.com/jeworurowam/captain_s_table_punta_gorda_fl_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/guxosa/26551210449.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/semefibaxexobu.pdfIn PDF document text
    • https://s3.amazonaws.com/sefipa/47154450804.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94fb0d77-4f21-4b19-b30f-b9701d385f61/1831914949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/454c097b-ac79-4b4b-a400-f5199d5cd5fe/29289282268.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_off0000d2e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E0 4924 bytes
SHA-256: 8c9ef4228224e24f20f0098d74c2e292f3f88ae5fc9ed81c18314278140d41fc
font_01_sfnt_off0000e3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B2 11020 bytes
SHA-256: e70a56739fb02b52d29dee922761e5a6700265a46916eac5de362f4f926b1c14

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