Malicious PDF — malware analysis report

Static analysis result for SHA-256 93d1cc8ec02e9547…

MALICIOUS

PDF

69.4 KB Created: 2020-12-17 12:24:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: d89d6a914e3208afae605260d8fbe5b5 SHA-1: 1e6752940de4c1cf79452b7cc59e70edfb0a0e92 SHA-256: 93d1cc8ec02e9547f453106e8eece601000e1b4ea37f12f74e63ed9267605aa9
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://cctraff.ru/strik?utm_term=britax+parkway+sgl+manual'. This URL is likely used to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan.

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/strik?utm_term=britax+parkway+sgl+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4448538/normal_5fa00b42e5b4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388412/normal_5f94770c0a57d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5f93b0114439e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/285fb6b7-1d22-4c5c-ac0a-df6627ad6303/10273517073.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d5bd77-ca08-456c-bb58-1b31457344fb/kisenuvopunizaduka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdf5cfc-92fe-43e3-8d26-6043bce09486/28722269563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d16f5ba-8728-433e-b394-195aecab503d/que_es_la_lectura_selectiva.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d264c92f-ed52-42fa-becf-1f2b6e93a338/tutaw.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5ab1b88c99b6d37c7dc09/t/5fccfa5ad235d37878c827a7/1607268954520/tafukisolisojozufasukeran.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d902f043-ed64-4674-afef-54145ed8b63f/56405801772.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e465b6ea-7f10-416e-bcae-baa8d8402fae/62647860612.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cfdf4a61-0c58-446a-b834-819f1f01ab77/comparative_economic_systems_worksheet_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f479e5-fca1-4af6-abc7-7f5bdc4a40a5/metegebexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ae6d710-356c-4394-9cb8-b671cb15730e/libro_de_educacion_fisica_1_secundar.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e9eb3398ff75152e2002/t/5fc13af87acac6192aeda02d/1606499065459/pulamupanosepapefisawegop.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bd86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD86 5512 bytes
SHA-256: 85273dc486d7deca69ec9ebb8c12e67bb1a191aa91adfc605961a01fb8ae7bc4
font_01_sfnt_off0000d05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05E 10460 bytes
SHA-256: 5bf2d035b52eb4d5a7f944d93972a246498b0e197027d61492dadaae1771c4d6
font_02_sfnt_off0000f43a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43A 16028 bytes
SHA-256: ced8b21f0c91c47eb2a8e10a251844195ecd6fd413d2ce9a64032c85f057f195

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