Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b117c2619734202…

MALICIOUS

PDF

61.2 KB Created: 2020-12-07 14:43:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 95d7e83b9fcd4d47bceccbb72046cf81 SHA-1: 9707c6c4ed49390d23bc4efdc0a4c140d9c3e2f4 SHA-256: 8b117c2619734202a057ffaaf1cd8f8c05dc81717be9fbc702a852c33ead28f4
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 0.9994

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/strik?utm_term=dove+and+grenade+logo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4445340/normal_5fa81b5b7cffc.pdfIn PDF document text
    • https://xanugobolenaz.weebly.com/uploads/1/3/4/3/134371028/488310.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/bejosituzupini_xifofomonezuja_badukukowu.pdfIn PDF document text
    • https://vabebixeteguju.weebly.com/uploads/1/3/4/2/134234611/3054883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_5fa61adef0b70.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385847/normal_5f8e0e0373d7c.pdfIn PDF document text
    • https://xuzelete.weebly.com/uploads/1/3/2/6/132681171/tolizewopel_pexasok_dejetukibo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409409/normal_5f9428f87f60f.pdfIn PDF document text
    • https://vafumigoku.weebly.com/uploads/1/3/1/3/131384305/warepanadibi-mutowovos-bakorexejav-mirazumepeju.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/xezonijida/battle_realms_3_android.pdfIn PDF document text
    • https://s3.amazonaws.com/tobovunoberiki/vinyl_sheet_flooring_installation_omaha.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ab40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB40 2900 bytes
SHA-256: b3dfb2f2c41da7350fc3755141d2fd0ea5796bb125df25fec831093623ff73df
font_01_sfnt_off0000b583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB583 4876 bytes
SHA-256: 713f5fcc8e7aeb24f385df6d82bc1c8ef678d9e91ff7ff4d4a3b4c491390fbe9
font_02_sfnt_off0000c635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC635 10036 bytes
SHA-256: 6da8118457658ea36732c7c9aad18a6db24869ba223fd716aca6a71b1b1302f4

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