Malicious PDF — malware analysis report

Static analysis result for SHA-256 7186f243dd2ae6e9…

MALICIOUS

PDF

67.2 KB Created: 2020-11-14 05:28:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: f3c24a33814cf53c6e025966ccd415d1 SHA-1: dacaa0d911363b92a3088e54e49e763610f24363 SHA-256: 7186f243dd2ae6e9eef2fe394b7485f549cdbf29b92f2d3f3c28fe3de4df6580
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/123?utm_term=taylor+swift+red+album+download+free PDF link annotation
    • https://wodedofa.weebly.com/uploads/1/3/4/3/134320626/0a63dfd03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389104/normal_5faab8dfa29a3.pdfIn PDF document text
    • https://sofakixejiz.weebly.com/uploads/1/3/4/2/134265497/tigupove.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5fa379fd4d98d.pdfIn PDF document text
    • https://nifazupu.weebly.com/uploads/1/3/4/5/134507595/9035232.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407302/normal_5faf303464ba8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_5faa040d96480.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404745/normal_5f9265503ae3b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369503/normal_5f9f8acd2280d.pdfIn PDF document text
    • https://bubiwodepu.weebly.com/uploads/1/3/2/8/132815961/4638621.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/7527046.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404753/normal_5faba35bb6eee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387419/normal_5f92846f2d4ff.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/5722268.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000c94a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC94A 5336 bytes
SHA-256: 336e5c3afadc35ba2f74a7b1f317c00e4ea67f0be4342ac3faf4a827faf66c30
font_01_sfnt_off0000db70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB70 11008 bytes
SHA-256: e4f7b8d4ec6effbcc653e12f708a79b1641e05c5e1785fcc59da6136012765ae

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