Malicious PDF — malware analysis report

Static analysis result for SHA-256 fdacd15fc9fc6ff1…

MALICIOUS

PDF

75.9 KB Created: 2021-02-14 09:10:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: bf72e386f0fd0ce92107a54bcb14fb8c SHA-1: baa5e03b500ca9d7b964e0dd12f48ccb92d78050 SHA-256: fdacd15fc9fc6ff19e797bbc9c2f938f00357a29baf86cbd4eae4546e5cf699f
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URL points to a resource that likely serves the malicious payload, disguised as an academic worksheet. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create PDFs from web content, further supporting the idea that the embedded URL is the primary source of malicious content.

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
  • 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://jottigo.ru/wix?keyword=finding+the+domain+of+a+function+algebraically+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4413838/normal_5fca6af7ca3f6.pdfIn PDF document text
    • http://muzhskoizhurnal.ru/interchange_fourth_edition_level_3_workbook_answersxojko.pdfIn PDF document text
    • https://cdn.sqhk.co/baxorurifina/bhc9ogi/linusedodefuvudojefu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413707/normal_5fd8f09ba4991.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463538/normal_5fed722c692c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484820/normal_600bbcfba5a98.pdfIn PDF document text
    • http://compte-cmbretagne.best/rulinamudodavokamopisoh7u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370541/normal_5ff6165c4bce0.pdfIn PDF document text
    • http://kmplitka.shop/birthday_invitation_design_templates_freeh2dlg.pdfIn PDF document text
    • https://cdn.sqhk.co/lerutefo/ehNwhe5/sewemivipu.pdfIn PDF document text
    • http://all-host.site/837748021760mez9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384046/normal_5ff3aa591a658.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473938/normal_5ff7a3c195353.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448713/normal_601e840c2a059.pdfIn PDF document text
    • http://daating19.site/number_json_formatkor67.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413373/normal_6002faa720129.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451929/normal_5feb0599caa28.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bezegorev.epizy.com/19556933811.pdfIn PDF document text
    • http://fikikozazilut.rf.gd/99525499164.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_off0000eb11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB11 5788 bytes
SHA-256: 096d6e7e1098e85648f7c15a08abb0484f31861085a36ec4e052a1e44193422f
font_01_sfnt_off0000feb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB7 10216 bytes
SHA-256: 310356f5fdf9404ed00ea8f732446e05f7ad85ae3ecc5941ac1448e06e763540

Open this report in the interactive analyzer, or submit your own file for analysis.