Malicious PDF — malware analysis report

Static analysis result for SHA-256 83ce5859de352116…

MALICIOUS

PDF

68.1 KB Created: 2020-12-19 06:15:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 53746ea951e36f16622a23643a0a87f3 SHA-1: 91f1c95df4f88803cd9ba455c334843da8934e4e SHA-256: 83ce5859de352116414d2f0b51fed2d076717d29e91dfd117f16a893a4d3faba
154 Risk Score

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 0.9995

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://ggtraff.ru/123?utm_term=girls+in+shower In PDF document text
    • https://tugoxalimirufa.weebly.com/uploads/1/3/4/3/134310877/1566529.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369776/normal_5fd894d398a30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376088/normal_5fb9fac7ca628.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381756/normal_5f92eed01099a.pdfIn PDF document text
    • https://pedugosiv.weebly.com/uploads/1/3/4/6/134622687/nuxokafodiduxu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366009/normal_5fc89fe8707fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449968/normal_5fc728a008dde.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc4c5737848ba205d318c94/t/5fc54d1f3570fb44d1b1c376/1606765858460/28549619068.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc3c1c3bd14ff0dd2ae6766/t/5fc5cbb92dd96f5918b68588/1606798265524/think_with_socrates.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdd55bb6394b41d64250a19/t/5fdd76acc18bd5077c8b372a/1608349357417/vexuwazaxafodepexa.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_off0000d0d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0D3 4684 bytes
SHA-256: 32c4526d968b7f433e129d4369c2b040c09cb38dc630290c7f28a703c658e319
font_01_sfnt_off0000e0cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0CC 10532 bytes
SHA-256: 5dcfd2f64beb95c3756f18fd5a9dbc70fe9952c0b123fd1d8fcd80952fc64db4