Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e8ea34ab0da01d…

MALICIOUS

PDF

73.3 KB Created: 2020-11-11 00:11:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a10f10de798766fa33607e0b564622b3 SHA-1: be3b1f84f4323e026cf374b98bec932e013b8a09 SHA-256: b8e8ea34ab0da01d47dbe0d3a5c9ba6ceec6dc89ce4a950f39d8bd6a1915b601
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 0.9998

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?keyword=managerial+accounting+chapter+7+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f9b7da535918.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366369/normal_5f9af876a061d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407777/normal_5f94818989830.pdfIn PDF document text
    • https://besiwalufeg.weebly.com/uploads/1/3/2/6/132696214/76a3c79ca168c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f966ff92b482.pdfIn PDF document text
    • https://sujajikozodes.weebly.com/uploads/1/3/1/3/131384638/34149.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/a9bb20eb-c863-4745-ae1c-7de4437d9482/jediwoli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bdddd29f-9033-4e6e-8c47-8a15bcaeafe5/dolixosat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da3c857d-d54b-4509-8f10-a865fbd139e0/toburabale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce7f3a2f-3ce5-441b-b6af-ac30c4deed99/audio_control_epicenter_bass_knob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccda4ec6-4914-40c7-a47d-cb795fd9c4d9/11832852757.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bbb95a9-4260-4a1c-8204-b5e99648b4e3/chema_alonso_libros.pdfIn PDF document text
    • https://s3.amazonaws.com/vokeri/zach_mindy_married_at_first_sight.pdfIn PDF document text
    • https://s3.amazonaws.com/satedafadusizo/lumeziwebogutasuxu.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_off0000e07d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE07D 5372 bytes
SHA-256: 4e80cf78a00f877242a089a2ed76c34a10c4d51374d7decccb024d223488cec6
font_01_sfnt_off0000f2e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E3 10984 bytes
SHA-256: 0bb9c910b640587593b6accd2c613132826580546064c69776f357a208df0296

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