Malicious PDF — malware analysis report

Static analysis result for SHA-256 9523cb48420a4735…

MALICIOUS

PDF

66.1 KB Created: 2020-11-23 13:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2ef97fe31b27540c1cdd6b1b4c990112 SHA-1: ba21ee99244d58095e130ce801297fc676ccc0e9 SHA-256: 9523cb48420a473572a33cf8c689d4c7ffe28e489216d1001bbbc017a2c1303f
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically indicating a phishing or trojan threat. It contains an embedded URI pointing to 'https://trafftec.ru/strik?utm_term=native+american+guided+meditation', which is likely the distribution point for a secondary payload. The presence of a 'download button' heuristic further suggests a user-driven download attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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
  • 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://trafftec.ru/strik?utm_term=native+american+guided+meditation PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5fa63017b460e.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/35c8d4e7-d945-49e8-8043-c5d3cbda47ba/13687823126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e8468b2-3d18-4adf-b7a7-7d5eb06549ba/kalobu.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/alexander_tamil_movie_film_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/gofofazabezejebaral.pdfIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/zasonikujok.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/63035600917.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/924ee167-eb51-4c27-957f-311cb43f94d5/34648008233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efd1947c-d1ca-4edc-a28c-abdd2c77c98e/zepatobeboreparasoxarigas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d98dcde0-1eb0-4ec9-9acd-27e54171653a/manual_for_exerpeutic_900xl.pdfIn PDF document text
    • https://s3.amazonaws.com/kewuxejikiwe/cgp_physics_workbook_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/4278059654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdf0b3ba-0ace-4e0d-ae53-26dbf81d5433/90867381729.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_off0000c707.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC707 5076 bytes
SHA-256: db95bab358866084723eaf4322f8da8eca5b54cc89e1c8533f6fe9bdefa2f539
font_01_sfnt_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 10352 bytes
SHA-256: e4cf7f6b7774aff59963407fda1e1c017069537afdfb0464e80f09c7da14649b

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