Malicious PDF — malware analysis report

Static analysis result for SHA-256 67de9d374f8d2bb7…

MALICIOUS

PDF

72.5 KB Created: 2021-03-17 08:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 0d562f8e51ede3dbed2aa501a377bf6f SHA-1: b56d7224444a762b0362c190e972d529c32a3c1c SHA-256: 67de9d374f8d2bb7b34a4462b3a97a4a8d4f63c7d55a927487605f1484e771be
104 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a site offering a driver download, which is a common lure for phishing attacks. ClamAV detection and ML classification strongly indicate malicious intent. The presence of a 'download button' heuristic further supports the phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://resalured.ru/strik?utm_term=hp+psc+1315+driver+windows+7+64+bit+free+download PDF link annotation
    • http://ronifibofizet.medianewsonline.com/how_to_answer_a_question_about_your_weaknesses.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426551/normal_602cf4b7e7abc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369765/normal_60041b2b30600.pdfIn PDF document text
    • http://fastcreditcheck.info/tres_metros_sobre_el_cielo_trailer_itaqkwxv.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/bagokiko/64215040222.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/331d3f5c-c8ca-4f8f-9106-2685e0630b3f/what_is_a_one_sentence_a_day_journal.pdfIn PDF document text
    • https://s3.amazonaws.com/lupuvogotog/75328062078.pdfIn PDF document text
    • https://s3.amazonaws.com/numunenoji/what_does_priority_deadline_mean_for_graduate_school.pdfIn PDF document text
    • https://s3.amazonaws.com/sugowubuf/sipozofune.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/68357047944.pdfIn PDF document text
    • http://vepitejususas.atwebpages.com/naruborewinukopeji.pdfIn PDF document text
    • http://fetekovabu.onlinewebshop.net/how_many_seashells_links_awakening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1edafcd-8661-4d58-b2c7-42646c7f2997/20347194081.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_off0000dad2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD2 6064 bytes
SHA-256: 296e927eeed31492fd44605ce511a8babaa97ba8168b150a81a3654e7e44dea7
font_01_sfnt_off0000efa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA4 10800 bytes
SHA-256: e41e8b6466f7a49676e89b9a04986a4df9f28877a268b055b35584fb0e855f61

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