Malicious PDF — malware analysis report

Static analysis result for SHA-256 ccedd88235f87149…

MALICIOUS

PDF

63.6 KB Created: 2020-11-12 00:18:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 3a6f3f8a9361e681a9e9196195616830 SHA-1: 2a17b4b49ec7d1e0b38910cb3a07313d7f452ce7 SHA-256: ccedd88235f87149ddf7aeeb8d3c623516da663ccf662caddcc86b1b2813870b
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://traffset.ru/123?utm_term=district+118+traditional+calendar PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446161/normal_5fa0669e3310e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421040/normal_5fa6f1a8a0122.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458848/normal_5faa57315268c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369487/normal_5f8e252819c66.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5fa2ebf3e5894.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/jokez.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391903/normal_5f91fa5025f3d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369794/normal_5fac5f028abb8.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/xetasif/julekerelowimegobugef.pdfIn PDF document text
    • https://s3.amazonaws.com/dafalebinoza/how_to_reference_a_lab_manual_in_text.pdfIn PDF document text
    • https://s3.amazonaws.com/rovuweraja/cricut_transfer_paper_hack.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/90024002497.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_off0000bb85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB85 5180 bytes
SHA-256: 98748a50307ce884439a1522e7b852bdeb5e07fd590ce8fa63821cf6bc167ed3
font_01_sfnt_off0000cd37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD37 11092 bytes
SHA-256: bdc5cb4ec3c21b0332af291bb8cbdd73dd2d30ce7be1f4eea38a516fe4870544

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