Malicious PDF — malware analysis report

Static analysis result for SHA-256 d431b60e22b7d47a…

MALICIOUS

PDF

74.5 KB Created: 2021-03-15 10:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: b9c90baba8bd7f4d28d6737ee7e8b203 SHA-1: 47b0db4cdf6ce033fdbba75835a06ec3422af512 SHA-256: d431b60e22b7d47aff517795d4c6856b0991c824a32655eabbf895635b665bb0
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI that mimics a download link for a 'ccna wireless book pdf free download', suggesting a phishing or social engineering lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of multiple suspicious URLs points to a downloader or phishing campaign.

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://druttle.ru/award?keyword=ccna+wireless+book+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/duzixulok/KEhgehi/where_to_find_coins._ph_wallet_address.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503578/normal_5fc61336e80f3.pdfIn PDF document text
    • http://zejizeb.22web.org/stage_2_hypertension_treatment_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/vitikitema/cNidPcQ/nidibujuliwuvakele.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415525/normal_60094f0d6878f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383308/normal_6033b6e8c7310.pdfIn PDF document text
    • https://cdn.sqhk.co/towinomer/FjcrPih/kazomegojiso.pdfIn PDF document text
    • http://1cats.space/60698029066v3f71.pdfIn PDF document text
    • http://tedusoxunola.22web.org/definition_of_organizational_conflict.pdfIn PDF document text
    • http://reduslimitalia.site/adivinanza_dos_hermanitos_siempre_va8jkr7.pdfIn PDF document text
    • http://rijogemas.iblogger.org/best_non_canon_star_wars_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476938/normal_5fe9674f323bb.pdfIn PDF document text
    • https://cdn.sqhk.co/xolovagi/phbAjUr/52332420995.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/petubapizo/raxalokovugixufevutijowoz.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/what_is_the_purpose_of_summary_judgment.pdfIn PDF document text
    • http://muxofitum.rf.gd/how_much_is_stephen_craig_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/gopagenebevazezunowoxike.pdfIn PDF document text
    • https://s3.amazonaws.com/zamuriza/bangla_sad_kobita_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/bajenipipokoga.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/gurese.pdfIn PDF document text
    • https://s3.amazonaws.com/fejakixoweka/dizufidetekuruze.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_off0000dc3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC3E 5352 bytes
SHA-256: 4879fe9ddff9020b61c7df41d5ff17aca3b93d9df25db75ef39502560a7c4f44
font_01_sfnt_off0000ee8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8F 16524 bytes
SHA-256: 9090f579a3f68d56643aaa0a4e3376eeca42066126dd2dcdfd629eff3272470f

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