Malicious PDF — malware analysis report

Static analysis result for SHA-256 181e2048b74a0d50…

MALICIOUS

PDF

59.4 KB Created: 2020-11-20 14:20:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 318d8d30b77f412f76ade1f5ea0555f9 SHA-1: 55667fe7492733df58ed42cd6ea201ebe89d45cf SHA-256: 181e2048b74a0d5082cc68ff5123ce35b6d18d855d462ec5ca756a6342381e03
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a technique often used for phishing or to distribute further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of external links and the PDF structure suggest it's designed to redirect users to malicious sites, potentially for credential harvesting or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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=paint+and+sip+business+plan PDF link annotation
    • https://nukubutoti.weebly.com/uploads/1/3/2/3/132302768/pobozo.pdfIn PDF document text
    • https://wajusozoxedaxu.weebly.com/uploads/1/3/4/2/134235608/pinema.pdfIn PDF document text
    • https://sujutirox.weebly.com/uploads/1/3/4/5/134595549/likevimatekefod_fuzuj_fisos_wotofexo.pdfIn PDF document text
    • https://fixasamajiwige.weebly.com/uploads/1/3/4/3/134318971/gojupaz-padat-vibamavewatamo.pdfIn PDF document text
    • https://togitarusufojir.weebly.com/uploads/1/3/2/6/132681229/246df1eec6e.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/xupimaral/ketidobapepejofapeburovej.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaporam/oshkosh_flyers_football_club.pdfIn PDF document text
    • https://s3.amazonaws.com/gixirojozogufux/funexixusorosesow.pdfIn PDF document text
    • https://s3.amazonaws.com/setaxilitozuko/lifosodaj.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_off0000b075.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB075 5000 bytes
SHA-256: 327b932a8ca7127f0e893fba36477706ddc1ecd94e01bfea89af5e455d2afcbd
font_01_sfnt_off0000c180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC180 9412 bytes
SHA-256: 968692d0eb76d2d7a1e8be15b0963b17288c04b87eb721c33e73d327758eea3a