Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ff2e596c3c6c213…

MALICIOUS

PDF

76.1 KB Created: 2021-03-01 02:52:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 00a0c927795781172c8c4a807dcfad81 SHA-1: e182c02f6e73e75e68994c57eb4a9dad8a6886c3 SHA-256: 0ff2e596c3c6c2136cd688485dacdd6cfeea2762d519e8e6e7f2ce99b7ccc0de
156 Risk Score

Malware Insights

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

The sample is a PDF document that contains numerous external links, a common tactic for distributing malicious content or conducting phishing attacks. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically flagging it as a phishing trojan. The embedded URLs, such as https://seumenha.ru/wix?keyword=puntos+cardinales+definicion, are likely used to redirect users to malicious sites.

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://seumenha.ru/wix?keyword=puntos+cardinales+definicion PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4482625/normal_5fec989bdb292.pdfIn PDF document text
    • https://lefizedut.weebly.com/uploads/1/3/2/6/132681647/mosufunino.pdfIn PDF document text
    • https://kotasixunepa.weebly.com/uploads/1/3/0/7/130776076/8507613.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384832/normal_602866aa0cda7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368949/normal_5fff02d9ea4e8.pdfIn PDF document text
    • http://wenonize.22web.org/39267083857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496015/normal_60011995f17b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446635/normal_6002f3516ace9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393353/normal_5ffe044457510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368746/normal_5fc825d13abfd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380863/normal_5fd204ffb4326.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/nefagolom/piram.pdfIn PDF document text
    • https://s3.amazonaws.com/jazuravazaguz/binotologedenop.pdfIn PDF document text
    • http://kegagen.rf.gd/acids_bases_and_salts_gcse_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/vinejivunitego/75741431213.pdfIn PDF document text
    • http://zavujosabojid.rf.gd/2022_tsunami_tamil_hd_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/subididotikaregobivuderu.pdfIn PDF document text
    • https://s3.amazonaws.com/lixisariwulo/bifunitibexaded.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_off0000eadc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEADC 5016 bytes
SHA-256: bd6a3a503cf7cea3b0f3bd9c9fdb2dc4ba23d466313977464cd49b63ef2fba69
font_01_sfnt_off0000fbfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBFC 11632 bytes
SHA-256: 66bd1b8d9d4153951738d30612bb0f529bef61be5173a8a437454c2f03a3f3d3

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