Malicious PDF — malware analysis report

Static analysis result for SHA-256 22ebaff78f1bf4d1…

MALICIOUS

PDF

86.2 KB Created: 2020-12-01 22:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 5446ecbfad3da6b85f72e47c911349ab SHA-1: 6cc8a259ed7dcbd9807ad13578a9346877836f63 SHA-256: 22ebaff78f1bf4d11e8411137cd968872dafe21e96553435e662e3defc8c5822
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with a high risk score. It contains an embedded URL pointing to a suspicious domain, traffnew.ru, which is likely used to host a phishing page or a second-stage payload. The PDF structure itself is also flagged for duplicate object bodies, indicating potential obfuscation or malformation.

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://traffnew.ru/123?utm_term=patellar+grind+test+sensitivity PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4390381/normal_5f946d9a3b249.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5f8c2af4b216b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376852/normal_5f8da55c2542a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475989/normal_5fa7f7ce3ff15.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408863/normal_5fa9049000bf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377678/normal_5f8cfa9b78098.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370317/normal_5fb3d5ffcdfda.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410989/normal_5fa1be6121882.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/5fc0d92f11f6a4198485658d/t/5fc11064cb3e0f57717536b8/1606488165450/prison_break_unblocked.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6990db3-b050-4de3-ba73-c0d809590cde/ravnica_allegiance_limited_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc128c411f6a419848742fc/t/5fc36b873c6ccf69f3ca2763/1606642568502/julien_stoermer_coleman.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/129a6803-c144-4de2-afa6-04d8e184660e/dozaluxitef.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcefcbedabee7b4406256f/1606217677501/soul_decrees_by_katie_souza.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe2dc1a97599144ec1c008/1606299074275/sweet_awesome_minecraft.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_off000114b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114B5 5156 bytes
SHA-256: f637f6c22b007cf842d40134d90e59f8c0138cff0c356bdf5bb8226b1c8b233b
font_01_sfnt_off00012658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12658 11084 bytes
SHA-256: 83eec4cd5f521231bd1fd9b83da600bf4f17afe485619ad2a998ce69bfd90588

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