Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7e91a61560a9236…

MALICIOUS

PDF

65.7 KB Created: 2020-11-12 16:46:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e70c31d7bda0c6f8169fbd252cac4a15 SHA-1: d0686b75ce67f372cee8c9740f2523ec1e12855d SHA-256: b7e91a61560a923643d23f352e68b5f857a2ff433a031db54e1f5f21d559399f
162 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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?utm_term=rick+and+morty+s02e03 In PDF document text
    • https://cdn-cms.f-static.net/uploads/4392667/normal_5fa1f82681021.pdfIn PDF document text
    • https://nixoferijoxe.weebly.com/uploads/1/3/4/3/134373865/6766406.pdfIn PDF document text
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/1067983.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/fazipelajub_ragirisuba.pdfIn PDF document text
    • https://sozivutapadonen.weebly.com/uploads/1/3/1/1/131164462/libefogasavozokolefe.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/309192fe-cd73-4589-995d-d46562478bec/werenujumazilor.pdfIn PDF document text
    • https://s3.amazonaws.com/wizedumi/jowopivaziberosudarosomeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f59c2aed-92ec-43e0-a8ef-e2ab21b75087/busy_as_a_bee_quotes.pdfIn PDF document text
    • https://s3.amazonaws.com/fazujo/99470094070.pdfIn PDF document text
    • https://s3.amazonaws.com/xutomoxu/google_press_release_def.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_off0000c335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC335 5664 bytes
SHA-256: 9b983012a3d13d3add0216cb0ed2fb52688c99c8757361e5dc85f6515f55e6d9
font_01_sfnt_off0000d670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD670 10136 bytes
SHA-256: 16f663dab09e0f48ea6e2f3e7838861c1d8cda70020b01b7ed39c683ebfe22ea

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