Malicious PDF — malware analysis report

Static analysis result for SHA-256 207c2b1301e445b9…

MALICIOUS

PDF

68.3 KB Created: 2020-12-09 23:29:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 957bff59b8d221cc5a93b2194e0eb1b1 SHA-1: 9b7bd51a10b1d1db23dd928affc0653a91cc7d9f SHA-256: 207c2b1301e445b977e1ec91890e8f359852fa79a28b24f38ea212259e3d5dd3
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://trafftec.ru/123?utm_term=key+lime+pie+martini+whipped+vodka PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387056/normal_5f9f942b26743.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383327/normal_5fbbff5b5a5dc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5f95a74850393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467273/normal_5fb2c5ff71252.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454813/normal_5fa3a45ac8afe.pdfIn PDF document text
    • https://piminuwimizo.weebly.com/uploads/1/3/4/6/134674326/koronubopiluloj-sidotufesipege-seguvoxomix-wevaw.pdfIn PDF document text
    • https://sobopagugakevul.weebly.com/uploads/1/3/4/8/134881985/bekaxo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468286/normal_5fbd518fb809e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382618/normal_5f960cb632f37.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/be54fbc7-6ea5-4b1d-9e6a-3e3d57ce24ba/dikamudewemutazateg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d654c89e1c4b8fe0815c/t/5fc6a9d43485235c86b2b50a/1606855125054/messenger_rna_ribosomal_rna_and_transfer_rna.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0ecd3c6ccf69f3262047/1606291151216/bagara_baingan_recipe_in_telugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88b4e25d-245a-42ce-a995-3e390a84a590/kikexepu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21f9cf19-2860-4894-a070-ace688c3a9e8/tobudup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12e38e9c-7608-48ba-9c64-776f82e28655/57981010197.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6efe7c2869f0c81c03194/t/5fcadd6fb6b7366152eccb3f/1607130481914/lozefukedawisafurelirafa.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_off0000ce4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE4F 5308 bytes
SHA-256: 19f9bd2057487f1278e6a74ecf92691b8de19dd79571badd40034eea576f41e9
font_01_sfnt_off0000e04b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04B 10480 bytes
SHA-256: e30d548b3c719b8e199713a970124ea6a1d91debfcd1bb32432e91eebcaf98a8

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