Malicious PDF — malware analysis report

Static analysis result for SHA-256 5aab4bee8aa44469…

MALICIOUS

PDF

293.0 KB Created: 2020-11-14 13:29:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 2e479f874d3c6d54c56731aea3af37b0 SHA-1: 98efb1e7d042dfedd236a1e8d6cee1db713934dc SHA-256: 5aab4bee8aa44469694ac8253efbdd6486e8b8eb44f559ff02916f2fbf461532
154 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 routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://ggtraff.ru/123?utm_term=lord+and+savior+jesus+christ In PDF document text
    • https://nagifinapu.weebly.com/uploads/1/3/2/6/132696111/4834494.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367627/normal_5f89a3add8678.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374710/normal_5fa65a0743def.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445877/normal_5f9d5ef442d47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373987/normal_5f9a7884c8927.pdfIn PDF document text
    • https://jawowigo.weebly.com/uploads/1/3/0/7/130774982/9379323.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_5f9841f080f12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421215/normal_5f9ac9e4031aa.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/kukowinotesem.pdfIn PDF document text
    • https://gokipeko.weebly.com/uploads/1/3/4/3/134351508/zagarirobabu-gegojoziwo-liwogefate-jezeto.pdfIn PDF document text
    • https://sanuvexugivi.weebly.com/uploads/1/3/1/6/131606490/bb445a256.pdfIn PDF document text
    • https://xovatikawe.weebly.com/uploads/1/3/4/7/134726086/musutixitavik_ganiwe_kanuraza.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/kopisigapub/hc-06_bluetooth_module.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/ba_1st_year_book_download.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_off00043d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x43D26 5072 bytes
SHA-256: 02a0aa2adefbf418453aa83f67eca02db21a8b6ab5ab6e6e27f32d2b2c0721fa
font_01_sfnt_off00044e6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E6E 18936 bytes
SHA-256: 39b8a7270125e694cd6a272b099d2e23fce76fe5e89ba83979bd79d3c1796354

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