Malicious PDF — malware analysis report

Static analysis result for SHA-256 8575cdd197bd6c34…

MALICIOUS

PDF

71.0 KB Created: 2021-01-31 06:41:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 39930c3967b04d630a79ecd68919da0b SHA-1: 6248ba1dc6d200fb3264685f2d7c8f65be65bef5 SHA-256: 8575cdd197bd6c34c2a41362b5bfe9243ec313fb4e3198cf7ed55fc30c0fd0a3
96 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URL `https://seumenha.ru/wb?keyword=caravassist%20wont%20connect` is the primary indicator of a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect the user to a malicious site.

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
  • 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://seumenha.ru/wb?keyword=caravassist%20wont%20connect PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4488332/normal_5fc684f268393.pdfIn PDF document text
    • https://cdn.sqhk.co/taxuvoguraji/YVKRHEM/65311895976.pdfIn PDF document text
    • https://cdn.sqhk.co/kekelivig/egjU5ic/93729483829.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/hctBjhP/61048658388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444853/normal_5fd1087d35f56.pdfIn PDF document text
    • http://motirepefasake.iblogger.org/84214508137.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388065/normal_5ff142094170a.pdfIn PDF document text
    • http://sizijevoji.iblogger.org/twitter_er_chrome.pdfIn PDF document text
    • http://lisolu.org/41409377841s12ec.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jufosuliz.epizy.com/65332945258.pdfIn PDF document text
    • http://vutakeba.epizy.com/chhota_bheem_drawing_images.pdfIn PDF document text
    • https://s3.amazonaws.com/wanalovum/11755856150.pdfIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/pudowuregasojo.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/bookmark_in_adobe_reader.pdfIn PDF document text
    • https://s3.amazonaws.com/wixatax/numidamenorajoripafadub.pdfIn PDF document text
    • https://s3.amazonaws.com/gozifep/cameraman_ganga_tho_rambabu_songs_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d05c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05C 2900 bytes
SHA-256: a4b7c54839293824b13a482706f27d6fe64d34d2fe404ea26f2138a893610c3c
font_01_sfnt_off0000da9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA9E 4816 bytes
SHA-256: bf3e8a548710eee5eb97f61660fc1b9aa3c3afe63bfc848648ca902e92f9a2cb
font_02_sfnt_off0000eb22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB22 10460 bytes
SHA-256: 6f74feb5ee38deb35a16e6a6f0bc1c6a63bc7911e49d59da89667be644ca0d3a

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