Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff59f943eea53f7e…

MALICIOUS

PDF

68.0 KB Created: 2020-11-10 05:48:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0df3972e02e4b4639286f4a154c02b45 SHA-1: 2e12aa668a9fb032a9cb7675580b97566377efaa SHA-256: ff59f943eea53f7efe68723438eb1d59bdcdfcc57b1a319580ec83aeba781a0f
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 0.9998

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://cctraff.ru/123?keyword=soy+un+hijo+de+dios+letra+lds In PDF document text
    • https://cdn-cms.f-static.net/uploads/4446633/normal_5fa2a056d9464.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373517/normal_5fa9562e4fc77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448126/normal_5fa4741cd0509.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366982/normal_5fa3e11dec16c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368505/normal_5f9c9076484dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454543/normal_5fa0ea2c911f7.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/tibitexil/35928668579.pdfIn PDF document text
    • https://s3.amazonaws.com/jafujasiwetid/jitejigejipakel.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/sububanejibi.pdfIn PDF document text
    • https://s3.amazonaws.com/tonemakopinibem/dominican_republic_currency_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xovekolamoxe/awesome_cars_2_unblocked.pdfIn PDF document text
    • https://s3.amazonaws.com/nagev/54665997215.pdfIn PDF document text
    • https://s3.amazonaws.com/paxivogedewilu/econ_eoc_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/60256128481.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb71bdcd-6d51-4fec-902c-e16db037f887/deris.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_off0000ca2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2F 5196 bytes
SHA-256: 072600ff31e5d402d385b4cd490b216e871a68385f2550b9acd2dd0e1c86822f
font_01_sfnt_off0000dbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD8 11624 bytes
SHA-256: 625b550964566e843a6ba2ca5e576c1352eadaf8391c733e3d0d6e39de263110