Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd298ecf465ddc4b…

MALICIOUS

PDF

69.4 KB Created: 2020-11-10 07:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 39954245a6695a14f9ab03807f51f3e0 SHA-1: d77fbf275663190038a179627d17101273a16015 SHA-256: cd298ecf465ddc4bb4c565dd822692c7f70bb6bafdbd9ccb4971bf1bd8a831f9
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 0.9998

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://traffnew.ru/strik?keyword=name+that+circle+part+answer+key+gina+wilson PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421943/normal_5fa3a1e9bfdac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373755/normal_5f8912cd72929.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411490/normal_5f98f7ff912a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416332/normal_5f9abf5f511f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408177/normal_5f9bc7b020c15.pdfIn PDF document text
    • https://narimokilef.weebly.com/uploads/1/3/4/6/134603618/nanugimevono.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/a6b68cdc-4c7f-491e-bb76-f8d7ed13eaca/game_meadow_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fe16c43-fb19-4296-8dc9-0f6d6cd421f4/28340813208.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc28c131-1e51-414a-9cd2-00459bfaff17/xedunoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b51fcf-a788-4d16-bce2-25b469ee06c4/paint_night_albuquerque.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f86b05-aefb-40c0-98c0-88aed751b9fb/vasowetiju.pdfIn PDF document text
    • https://s3.amazonaws.com/wumodukubaru/27863997860.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b5a5599-e23c-450f-9428-045c31e2e0c5/62572580983.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/674126a7-6357-4fd7-9ad7-6d356dbfd12c/valixeg.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_off0000d1e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1E8 5576 bytes
SHA-256: 7f56f8bc5b803c2451734dfc6812a295793d1f6eab77785198b5efcdfed32ce3
font_01_sfnt_off0000e4d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D4 10492 bytes
SHA-256: e6f1333a69a7520c2b6a425bae54d168d29d00fd5af710b2f314e30121ec5ed4

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