Malicious PDF — malware analysis report

Static analysis result for SHA-256 83c724aa84935ad5…

MALICIOUS

PDF

69.5 KB Created: 2020-11-11 14:30:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 16eedf032e2211b528026e0530935fad SHA-1: dffe5ff68e9fddd13fb0f8387a5a95cac793ee16 SHA-256: 83c724aa84935ad5358f19f8632165706c2c3cfee4959ae3b9a0d421b996fc65
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 0.9992

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/strik?keyword=gravity+falls+season+1+episode+9+dailymotion In PDF document text
    • https://cdn-cms.f-static.net/uploads/4386349/normal_5f95960f2644f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380859/normal_5f9b1b0c3c379.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391623/normal_5f983b7d03c89.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5f924cb325f03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402262/normal_5f9158e22b4c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489045/normal_5fab5fdb83443.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405195/normal_5f91712bf3ba1.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://s3.amazonaws.com/mazugezijap/69110739140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3aec699b-e68d-4189-b8f0-7ecf30201a04/porovifowura.pdfIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/quantitative_data_analysis_treiman.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA33 3196 bytes
SHA-256: e95240029ac29277b7f258b9d7943889c3cb406f3d52e393864da6ea85fbd498
font_01_sfnt_off0000c5b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B6 5376 bytes
SHA-256: e2212dcfd23c91a0292496a500ac756576b3ef3c3e4c6f3e8505dbf7f9e7b716
font_02_sfnt_off0000d7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FD 10244 bytes
SHA-256: f0dd5fd3ff4061ce28eb910e90551eab86b0d02017131804b40324821e9f7736
font_03_sfnt_off0000facf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFACF 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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