Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee986a504ec13bb2…

MALICIOUS

PDF

74.9 KB Created: 2021-01-23 04:41:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 4a7735ffe31de095e6fa365127ab1965 SHA-1: 1959f0eef110066825ea79327229351bcbea5927 SHA-256: ee986a504ec13bb27ae90ee737ebe7b4cfdf5ba66a84179657cd5f1924818012
154 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'https://crophysi.ru/123?utm_term=hilary+brooke+mueller+linkedin'. This URL is likely used to redirect the user to a phishing or malware distribution site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/123?utm_term=hilary+brooke+mueller+linkedin In PDF document text
    • https://static.s123-cdn-static.com/uploads/4407804/normal_5fdd69274282b.pdfIn PDF document text
    • http://tidedejix.iblogger.org/stem_and_leaf_plot_worksheets_year_8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369782/normal_5ff05be1eb6e2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476445/normal_5fcbf31ba246a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414358/normal_5fe935cd4cc03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391602/normal_5fdf6b7baee33.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393502/normal_60002b0e6e472.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/numegubowalonan/34800407615.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/sedarajowojimatugo.pdfIn PDF document text
    • https://s3.amazonaws.com/farezelof/9912535079.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/26649712444.pdfIn PDF document text
    • http://bunakakivukutus.epizy.com/flow_chart_template_excel_2011.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/64812455275.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/vugexi.pdfIn PDF document text
    • http://fugovolit.rf.gd/city_skylines_layout_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/ciencias_formales_o_ideales_ejemplos.pdfIn PDF document text
    • http://dinopug.epizy.com/3396380500.pdfIn PDF document text
    • https://s3.amazonaws.com/wavunot/13787874830.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_off0000eaaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAAA 5060 bytes
SHA-256: 2ceffc0b5378a5b33641064d91b933dde87dee6b611de5eb4d92eec426a78367
font_01_sfnt_off0000fbce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCE 10224 bytes
SHA-256: 2a2324330872248ecc69aeca10927587a782d7520cad2d1df5bee138ada6bf5e

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