Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd3c96d53b4ec57…

MALICIOUS

PDF

65.9 KB Created: 2020-12-21 05:53:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 17cf2d5530cee2e5aafb90a42709cdf9 SHA-1: 92ffb812f3ef8fdd4d113736bf954b0962604a5f SHA-256: ecd3c96d53b4ec57bfa53839d227c22fb9c89d2bb286a717a027da3587fdc6a8
214 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to lure users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffking.ru/123?utm_term=reformation+study+bible+pdf In PDF document text
    • https://gisudilepa.weebly.com/uploads/1/3/5/3/135346020/9406971.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427519/normal_5fa0aa33c23d6.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/04dcce9a-169b-45d7-8052-336801ab1409/teacher_appreciation_certificate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b26dbc8-c27d-44d3-b376-d2c3fcacac52/dapedafatitaxumujobobo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8b03514-152a-40db-99e2-a5fdaab09757/98747243996.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6470776c-faca-4f11-a8a6-b62a0bc94a27/9969862989.pdfIn PDF document text
    • https://s3.amazonaws.com/gadumagabusodel/demowekuferodetebig.pdfIn PDF document text
    • https://s3.amazonaws.com/daselex/nombres_de_dioses_griegos_y_su_significado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/550a4c86-3401-4c37-a04e-ea7b35f95753/wozewekogoturo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12624ac0-8f82-4a67-9225-9bca7af3e9c0/zikurogimutuvotisan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6b766f3-087f-4c25-bfd1-c0ea7a8b6872/dental_school_interview_questions_sdn.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_off0000c525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC525 5436 bytes
SHA-256: 33f23c2a758aac75da3b32dc27dde9240e63f28f3a5e63782985f9a728332acd
font_01_sfnt_off0000d790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD790 10548 bytes
SHA-256: e855ddda0cf8294550c779f656dc5c32c31c66adde6dcf5fade6123e95eb7e3d

Open this report in the interactive analyzer, or submit your own file for analysis.