Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f97f9ad8b08b342…

MALICIOUS

PDF

97.5 KB Created: 2021-03-09 17:05:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8d89d17eb6372f4fb017ae2b9ba4918a SHA-1: d3c74edd2c3a99250ca786bf006916a78a030b7f SHA-256: 6f97f9ad8b08b34255e2e9de48e556621d3617d3993659d5ef0087f9dc111a8e
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a domain that is likely part of a phishing or malware distribution scheme, disguised as a free book download. 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://kuzutuzo.ru/award?keyword=zoology+books+pdf+free+download PDF link annotation
    • https://cdn.sqhk.co/bosamame/jjbidi0/speed_boat_lake_mead.pdfIn PDF document text
    • http://aslixan.com/tizemokadusivayh7st.pdfIn PDF document text
    • http://hamsterbig.com/inner_child_worksheets3s6c1.pdfIn PDF document text
    • http://kulokozataxat.22web.org/rakuwozujaginojir.pdfIn PDF document text
    • https://cdn.sqhk.co/mepapogivoma/gfgdgdQ/87283822986.pdfIn PDF document text
    • http://itsnat.space/walinafesivefefotezoklzdj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ef321a0-1da9-4d4e-adb8-e5e5b3438a3b/talk_to_me_in_korean_level_1_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/329a2d34-deda-48fa-b4bf-31f09211a02c/muzunovas.pdfIn PDF document text
    • http://sipofepusadofas.rf.gd/94357940553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a858ebf3-4767-46bd-a62a-8d14aed653b6/diario_de_greg_un_viaje_de_locos_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/bojafazes/belligerent_sebagai_subjek_hukum_internasional.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/82007906861.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/biboj.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/family_feud_google_slides_template.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/fefafoketabuf.pdfIn PDF document text
    • https://s3.amazonaws.com/wotodedaruzuk/assistant_banquet_manager_interview_questions_and_answers.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_off00014281.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14281 5564 bytes
SHA-256: 285b3087c35328277313ab65aaab05067330aeaa082c8c93500a477d04ba93d2
font_01_sfnt_off000155a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155A2 10328 bytes
SHA-256: 1087e7fa8615aa772c7cfa5ed020a1a0f1fc182057f2867f5d2ea5a1d1426ed2

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