Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c4d46dc8a425c66…

MALICIOUS

PDF

75.3 KB Created: 2021-02-28 17:30:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 24045e638c9fd455ca312e81e5b6cd95 SHA-1: 407d95ff1549174475b7c2c448fc57620ecdacd0 SHA-256: 5c4d46dc8a425c66dc63212cc0d95799478eec1421c5c0e8d8644475997fc991
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=4th+grade+go+math+book+pdf PDF link annotation
    • https://cdn.sqhk.co/bidusowo/cjbidRj/world_football_league_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413719/normal_602d2bb100dc8.pdfIn PDF document text
    • https://cdn.sqhk.co/lulaxujik/jeHhcab/food_wars_season_3_dub_release_date_2020.pdfIn PDF document text
    • http://retamos.mygamesonline.org/jatoxaxakivopuxegoravupo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468296/normal_5fe1f273dd72e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466408/normal_5fdb7c0133df5.pdfIn PDF document text
    • https://cdn.sqhk.co/zabitokepum/Mi63hi8/listen_free_voice_chat_rooms_apk_download.pdfIn PDF document text
    • https://cdn.sqhk.co/momujolo/P4IJGhg/73976944404.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/difigomisosak/lisabedojutogal.pdfIn PDF document text
    • https://s3.amazonaws.com/lanorolowu/68387444607.pdfIn PDF document text
    • https://s3.amazonaws.com/palevijuj/ruger_p95dc_recoil_spring_assembly.pdfIn PDF document text
    • https://s3.amazonaws.com/benuka/daxapagetexapuxezopaven.pdfIn PDF document text
    • http://nejesezape.myartsonline.com/dukosagorugabogijo.pdfIn PDF document text
    • https://s3.amazonaws.com/nojemi/bajaj_allianz_life_insurance_policy_information.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_off0000e914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE914 5444 bytes
SHA-256: bfa17023970c5d07cfeb44106bbe02334e1c55deb88f08377a0e96f7e1ab71d4
font_01_sfnt_off0000fb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6D 10840 bytes
SHA-256: 50ea065e8ce4ad9faa574728a555c68d686d16347dc22d97ab0e07cebc96e9bd