Malicious PDF — malware analysis report

Static analysis result for SHA-256 d86eb1e6bdc35eda…

MALICIOUS

PDF

69.8 KB Created: 2020-12-15 01:40:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b04a1fed88676036f3545a5e1898f765 SHA-1: 329e8a2bdab768f77a1138e6d841d9943693ea8b SHA-256: d86eb1e6bdc35edaaec54d8e49b1f986630bcebdf55f7c59a1d44ca7b4211be2
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM'. The presence of a malicious ClamAV detection and a high ML classifier score further indicate malicious intent. The primary malicious URL identified is traffnew.ru, which is likely used to host phishing content or further malware.

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://traffnew.ru/123?utm_term=we+are+okay+nina+lacour+summary PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375358/normal_5fa31c07c6a8f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444114/normal_5fbe5eb55a4ee.pdfIn PDF document text
    • https://rurasaza.weebly.com/uploads/1/3/4/8/134869927/likinomevotuxe-mavas-dexigib-bipug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc1220f7848ba205d19f2a8/t/5fc5d6d861e25426e1026a9c/1606801112752/working_in_groups_engleberg.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf21a79c08c7f2b9dbe26/1606218267831/55282949960.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5a0ade2fce462bcac1c8d/t/5fc8d6dbd32d01267803bfac/1606997725871/lightning_wyvern_ark_command.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf406cc1-4780-4b5d-a3b6-8c1bebf26b62/young_and_dangerous_the_prequel_subtitle_indonesia.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/complex_partial_seizure_treatment_guidelines.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc10fb5bda9c57a97bf17be/t/5fc170644f9837572015e6b5/1606512740963/77995438371.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc6fd919849b27a00a3c0c7/t/5fd1b946ce71ee580fa9d807/1607579976904/pentimento_music_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/701aa9b6-cc05-4bdb-a7d1-8d15beb35274/24425180992.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/nodomewaluvexozesikizada.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4d10ee2fce462bca5020a/t/5fd61434ab1a676c7284f8b2/1607865396777/xadopojisanedodozib.pdfIn PDF document text
    • https://s3.amazonaws.com/jupevuxirapi/20517881923.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_off0000d5bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5BF 5124 bytes
SHA-256: 7b3704190b5b0c869b52e5c678969c911b9bc8dfcbf6b1ebb3fb834120c01bdf
font_01_sfnt_off0000e72f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE72F 10380 bytes
SHA-256: e83f68259fabd0f3aeab51b5c65c7b98cbbee701029f9091aa54c46ad398a17d

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