Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f0ba01d457537d7…

MALICIOUS

PDF

79.7 KB Created: 2021-02-26 07:44:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f5673e68c791d7102002f48bcf767c2f SHA-1: 9f09ae4b39798a1d289e14bbef2536a1e9c3d785 SHA-256: 8f0ba01d457537d765b7f0516f92f47a7f29f75bdc4e96e833aa90e9fa9606ca
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a website disguised as educational material. This URL, 'https://druttle.ru/123?utm_term=sat+math+sample+questions+and+answers', is likely part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=sat+math+sample+questions+and+answers PDF link annotation
    • http://worelimupuvefam.mywebcommunity.org/lovepajirukevimoxuxesupak.pdfIn PDF document text
    • https://cdn.sqhk.co/nadipozow/ehbsING/baby_tips_the_ultimate_parental_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/rufebumu/dEPRvmj/pixezabakewivabetifif.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/writing_complex_sql_queries_examplesobkiu.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwumixe/oE9hajh/survival_servers_space_engineers.pdfIn PDF document text
    • http://nickned.me/sumas_de_cuatro_cifrassevq2.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/93149483629.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/xubosuvuloda.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/jinotugiwomo/romeo_y_julieta_wide_churchill_gran_reserva_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/the_greatest_love_of_all_piano_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/sosomepoleluwe.pdfIn PDF document text
    • http://zesafemumibow.myartsonline.com/order_of_operations_definition_statistics.pdfIn PDF document text
    • https://s3.amazonaws.com/zijivevip/la_cucaracha_horn_free_ringtone.pdfIn PDF document text
    • https://s3.amazonaws.com/libusamagowuvo/15467839740.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_off0000fbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD5 5520 bytes
SHA-256: 1ae3f449fa6ed03bfd7b24aacd8a36f2bddc2f33677d86b6c84430b0d092ce6b
font_01_sfnt_off00010e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E7B 10348 bytes
SHA-256: d981c4622cdd95b602aa486d53f663f81631f23d1f867a142e8bd45b760ba51a

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