Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d392b41892fa340…

MALICIOUS

PDF

72.8 KB Created: 2021-01-19 06:02:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: fceb142c823dc365ad916ec142067f4c SHA-1: ada93b37484258cf98057cfeb9a254c59194c4e3 SHA-256: 8d392b41892fa34043dab435502fbd9a1cb76d2d58d825d2917fc86dadd2b2a8
96 Risk Score

Malware Insights

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

The PDF document contains an embedded URL that leads to a page related to drawing a rapper's face, which is a common lure for phishing or malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect the user to malicious content, likely a second-stage download.

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://jacksth.ru/wb?keyword=how%20to%20draw%20a%20rapper PDF link annotation
    • https://cdn.sqhk.co/jegamaxegev/gj5hfy5/nova_scotia_express_entry_guide.pdfIn PDF document text
    • https://site-1178040.mozfiles.com/files/1178040/tenitikefonumasobesixeko.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475716/normal_5fe3ac7f1ebe6.pdfIn PDF document text
    • https://cdn.sqhk.co/kabevapixox/los3jb6/colour_bump_3d_game_mod_apk.pdfIn PDF document text
    • https://site-1171722.mozfiles.com/files/1171722/horizon_flight_simulator_mod_apk.pdfIn PDF document text
    • http://kexejadupuna.66ghz.com/43578153846.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444366/normal_5f9d8516b7097.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5fb4c3c4d15fe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490244/normal_5fc437ad0edd6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379380/normal_5fad4a878316b.pdfIn PDF document text
    • https://site-1177607.mozfiles.com/files/1177607/53203172258.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/zoxewudunigus/sikovopekoxonogofezafe.pdfIn PDF document text
    • http://gatapin.rf.gd/barbie_games_in_jio_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/wofaxil/4458671689.pdfIn PDF document text
    • https://s3.amazonaws.com/tudawufed/dopiwamunemuwa.pdfIn PDF document text
    • https://s3.amazonaws.com/lukepepe/45407687938.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/entry_level_nurse_practitioner_resume.pdfIn PDF document text
    • https://s3.amazonaws.com/wemupajese/diagnostic_bacteriology_a_study_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kimone/95574686266.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_off0000e1ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1ED 5204 bytes
SHA-256: 99c26d4103d666d5e65d36ee27612753a30c996cfaf944cd5b80ce3e60d304cc
font_01_sfnt_off0000f3c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3C7 10120 bytes
SHA-256: ec7e1e236b6d147e934d30a3400f0f085e2c23b4122d524c4a7b4075774c62b5

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