Malicious PDF — malware analysis report

Static analysis result for SHA-256 2230c73027e2f483…

MALICIOUS

PDF

74.3 KB Created: 2020-11-11 16:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e0d440732686ecbb89e90fc9ef9a20bf SHA-1: de2ac43e789c9102f4c1ea91be061c9338df5eaf SHA-256: 2230c73027e2f483325d5331f086d216929cf74354971979e369689d0edd7ae5
154 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 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 0.9990

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?utm_term=uno+reverse+card+meme+yugioh In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368501/normal_5f99b5ecbcdfb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373778/normal_5f8ea4bf59da9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375077/normal_5f8f6cf374269.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_5f8fea5949430.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/ce379002-404e-44ab-9cd5-f847715cdb92/lakogufe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7c44aad-9d04-4571-be9f-bdeb7bf99b77/14816889618.pdfIn PDF document text
    • https://s3.amazonaws.com/jubiferekaka/jukewag.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/tutigemibamozugutun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c0aa443-7e06-4d63-9a10-41a91e249ed1/redeem_minecraft_code_java.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77087f4-c770-4eb3-b75c-e3e87fba4d79/f5_101_exam_study_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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000f4f9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xF4F9 17468 bytes
SHA-256: bfff0845b3cc42c167ba8f14a0573ab9aac57229ef6bf545407574d586cc4c5a
font_00_sfnt_off0000bf63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF63 5276 bytes
SHA-256: 3d1263d0e9a6e10f1877e6692f04e0fff074b89e7386ce310d5a07787d4dd83d
font_01_sfnt_off0000d11f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11F 10428 bytes
SHA-256: 8f4e9d0cd3f71afbc2dc9977f43cb781012197873ac0f21634162978e6ab1802
font_03_sfnt_off00010e78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E78 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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