Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1c98eee07d8200…

MALICIOUS

PDF

78.8 KB Created: 2020-12-28 17:46:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: c418ecf992f2a7ed7032da8b1957f0ee SHA-1: d42d37bc48de12b79d0f9f88ce4c63fa2e9dc6bc SHA-256: 1d1c98eee07d8200194ea368d64f3541589299809eda3b34d5eb1d39918ebb90
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site disguised as a software demo. ClamAV detection and ML classification strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URI are indicative of a common phishing lure.

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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=school+management+system+software+free+demo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407810/normal_5fc071cec2b1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_5fb85636843bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426957/normal_5f9b46d56ffa4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452171/normal_5fa977c53b107.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416798/normal_5f95752d44be0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367617/normal_5fcb23153d92d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f873d97d2c08.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/82974234197.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/unblocked_games_race_car_games.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/298047aa-3376-417a-8bdc-3329ebdeda44/unidad_3_leccion_a_answers_que_chevere.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a37a48f4-cf2b-463e-8170-735e13db57e8/velemiwadesuwivonimid.pdfIn PDF document text
    • https://s3.amazonaws.com/xapijifas/podopogepidumowipepudeju.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_off0000f7c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C7 5732 bytes
SHA-256: 29e1ec73dfd03fbc0327e4b284ca660113580bf859e67152067c4932289eb2d2
font_01_sfnt_off00010b37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B37 10332 bytes
SHA-256: 2926e1836954a9fc6849e32568d97c23389e925cc0021f30b8d001ff5121fd5e