Malicious PDF — malware analysis report

Static analysis result for SHA-256 3f7eb5ba8604a439…

MALICIOUS

PDF

90.6 KB Created: 2021-04-04 12:47:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 4d38505dcf9e59325fca367cf322b8e0 SHA-1: 69194fae14723eb19288bf0580acdc5f909d8c35 SHA-256: 3f7eb5ba8604a4399fa7e9fdb11dab8685204e175ae4087800a87dbf45fd027f
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded URLs, one of which is suspicious and likely leads to a malicious download. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure for downloading content, aligning with phishing tactics.

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://leonvi.ru/award?keyword=the+wheel+of+life+elisabeth+kubler+ross+pdf+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455884/normal_6030a6ba7af32.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410975/normal_5fdcf650729e6.pdfIn PDF document text
    • http://jesawukimefix.mypressonline.com/xidulobupuzuronatirasetu.pdfIn PDF document text
    • https://cdn.sqhk.co/jarutejip/hhifjuJ/mapawetivi.pdfIn PDF document text
    • http://zikevamakag.mygamesonline.org/how_to_program_a_samsung_remote_ak59.pdfIn PDF document text
    • http://fabulouss.space/56239679753q725a.pdfIn PDF document text
    • https://cdn.sqhk.co/latusetime/jfEd0jd/3d_galaxy_neon_fidget_spinner_themes.pdfIn PDF document text
    • http://springital.fun/biblia_dios_habla_hoy_en_para_descargaralxbd.pdfIn PDF document text
    • http://my-favshopc.online/10739602yndqk.pdfIn PDF document text
    • https://cdn.sqhk.co/pegidago/0jdhgij/kefuxupo.pdfIn PDF document text
    • https://cdn.sqhk.co/dorejewibiz/tieX0mc/zuzumovukalapadobaginokep.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387433/normal_605c63a1e01bb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372384/normal_5fef7b7c29394.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nerezusilanake.atwebpages.com/assessment_of_learning_syllabus.pdfIn PDF document text
    • https://s3.amazonaws.com/fejififimaketo/zaxagibuf.pdfIn PDF document text
    • https://s3.amazonaws.com/wemazun/direct_debit_mandate_template_barclays.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/28009280010.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/jibixe.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_off0001269b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1269B 5372 bytes
SHA-256: f07a70010443cc1968d7aa534ee797f7434255777c72adee3b850d3b0c1c0c71
font_01_sfnt_off000138e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138E9 10544 bytes
SHA-256: 258e249c6780ee3bcc08bdf86b776e0a8f3989fbb081fb8d1f15744cf0196b36

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