Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b9e7ef84a71911e…

MALICIOUS

PDF

68.9 KB Created: 2020-12-27 10:02:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: e7a672608d3623702f554e15aaeff4e1 SHA-1: 1befcdd14eeaaa6a836df41345833c37f8973fc2 SHA-256: 0b9e7ef84a71911e20621612e26066b70fa8605b188f651c8308ee6008079bd8
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=hopper+stranger+things+actor'. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL indicates an attempt to lure the user to a compromised site, consistent with phishing or malware delivery.

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=hopper+stranger+things+actor In PDF document text
    • https://cdn-cms.f-static.net/uploads/4476952/normal_5fbe547f9a2c1.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/e7ae5e2c-1adf-4381-b187-d59469815a23/19397002742.pdfIn PDF document text
    • https://s3.amazonaws.com/zufaxepixiguxax/72797476416.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6224fc95-72dc-4074-85a1-2735a6dbb218/interview_questions_for_manual_testing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b3d47c6-7c74-4068-b03a-d4c35c8a8571/97785284288.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/wevunefuw.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/depopizixoxoxonilula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f5f4c3c-c00a-47f0-8f78-ee0800a8ac19/google_docs_project_almanac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a1c307d-e6b5-4ff9-9e6a-8f54018359a7/37768210657.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9f2730b-a61c-40cf-82e2-91005a8f87b2/competencia_intercultural_significado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6856368-5ead-4b6e-9c77-b3b1c98b50b1/malobul.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/145b3f5d-da9a-4770-848d-a1cb541fb2ee/bojotofibujojagi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/37e090ad-9eff-4d9e-9ebe-b6d7153b8b23/tea_staar_scoring_guide.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_off0000d008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD008 5124 bytes
SHA-256: 3cf668099a204aafac0f906d00fd5f9b5b8391b742958358b793800fd04f0c31
font_01_sfnt_off0000e170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE170 10844 bytes
SHA-256: e11f1c988f73c9dd890e3eedccdc7e59d8b6d3da9dbf24c999c3abb4547827df

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