Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4b24d01934d9617…

MALICIOUS

PDF

72.2 KB Created: 2020-11-10 01:53:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: c7cfbdb0e1097622d8873062a9dfb0fd SHA-1: 1fac2215bae262f59ac72131f5b59ea20e5b77c5 SHA-256: c4b24d01934d9617d44239c10cda0176c5a3e1aacb4f1f52ded565c661e4916a
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 0.9997

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://ggtraff.ru/123?keyword=panda+food+chain In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368468/normal_5fa7c9c2489c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415756/normal_5f94c3ff8ba1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373243/normal_5f8e4260b597c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410013/normal_5fa0f45be540b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368224/normal_5f89026021471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367289/normal_5f8741c3c7860.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/3b7d84b9-20fb-4417-a574-a393aea307aa/sm_t350_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14055f91-0917-4379-9282-7a89803a81ac/simawafok.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/58d6dcb4-a707-435a-95c1-e66edda76228/sovowiwip.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/light_reflection_and_refraction_class_10_notes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b6b80c0-2e52-466c-b9e3-7b99726f3bae/summary_of_things_fall_apart_chapter_12.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_off0000de1e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE1E 4804 bytes
SHA-256: dab4e63c8d93266a12c74bffc66259af3cd601ee4057a209f028ae56e1130876
font_01_sfnt_off0000ee79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE79 11156 bytes
SHA-256: d47410d7cb17f905bde2986a966ed1099fe9ea76ea2850bd662c46c44f006132

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