Malicious PDF — malware analysis report

Static analysis result for SHA-256 81dbabff7790664c…

MALICIOUS

PDF

75.5 KB Created: 2020-12-09 02:49:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: f3aa0524aeab71e5d5b47daa05ea9527 SHA-1: 97894061da29f614763435bf93001fe9c3833c43 SHA-256: 81dbabff7790664ccf94a4cefe001f337b379c803894ac808266fdbf948ce200
96 Risk Score
Tags
free-cdn-ebook-manual-lure

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 embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/strik?utm_term=warlock+of+the+archfey+5e PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488330/normal_5fa86b89a8a0a.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/xidazeze/54618876298.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52a818787e8798987a008/t/5fcebca599b6a7582b4f3e2e/1607384229505/kairo_club_malad.pdfIn PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/50660187980.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1057f405d5340f32a3beb/t/5fc780fa4f9413233b23b980/1606910210869/wordscapes_level_8519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93d22bf5-8f2b-4331-bf46-968a8bf0451e/41295012392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e6c092d-e60b-4d55-890a-0d13448ae388/wizuxuwipukovurakini.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd8a92bbd740658005df2/t/5fc90e7e384989346246d4ef/1607011966699/72034295092.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_off0000eac3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAC3 5092 bytes
SHA-256: e2e0706613b0e08b365f62c2354edd69de22c30d636ba572eb8e08a41f59d1ac
font_01_sfnt_off0000fc2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2D 10864 bytes
SHA-256: c5954a56d75fe5fd9c9524cc5cd371c5b87650e0159b517cdd58887f699b32cd

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