Malicious PDF — malware analysis report

Static analysis result for SHA-256 c419afa6b9900150…

MALICIOUS

PDF

43.6 KB Created: 2020-11-03 17:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 494955051d32d9ee6b4d42c71f806cc5 SHA-1: 27ff5aecd2f5a145079af7606ad16ced7cad4230 SHA-256: c419afa6b99001505a123e5bde932aa978161ebaedb25a4a0f23659ea177b64b
94 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 1.0000

Heuristics 3

  • 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?keyword=amy+austria+age In PDF document text
    • https://cdn-cms.f-static.net/uploads/4428045/normal_5f9caba3c4fbd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374976/normal_5f9aabc8deb6e.pdfIn PDF document text
    • https://sopowifumerage.weebly.com/uploads/1/3/4/3/134355846/2127268.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422914/normal_5f98247e6b0b3.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/dc4b82fd-4e5e-44e3-b7a1-cdcc5c75b6b5/30932065010.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/1975_cessna_150_poh.pdfIn PDF document text
    • https://s3.amazonaws.com/ruzumeb/44624661621.pdfIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/zegorabunomoxududeliwot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0deb72fe-861e-486a-929e-6525d4c3d0a5/82681692463.pdfIn PDF document text
    • https://s3.amazonaws.com/migivewuwe/jejizirozusaga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb67cf0-133f-4968-8541-f442e05bb058/the_be_happy_attitudes.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzamada/ribeye_steak_calories_8_oz.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/94113673229.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54dbd863-afd4-485f-af51-3d9ef1e81fbf/92991668295.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_off00006b26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B26 5064 bytes
SHA-256: fcc4b7af7f143d22b15930acc0d0813e7e1eda293b4997e0a991e4489e03ae76
font_01_sfnt_off00007c52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C52 10988 bytes
SHA-256: 4183977f44032fbdb3aa0c75f79ac508071c8d8b50b3897b972d6b86338e8e82