Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbaae3420671e2e…

MALICIOUS

PDF

74.5 KB Created: 2021-02-17 06:40:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 4e0eb99883ed7d139f8068b6a33141dd SHA-1: e5110f9c2d3487d402b533b3c706facecaf84dd3 SHA-256: 7cbaae3420671e2e26eec4d58f306ea448e70e52b88efe0e6be30c18fb7b8c84
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains an embedded URI pointing to a suspicious domain, likely intended to host malicious content or redirect the user. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The document body, though partially corrupted, suggests a lure related to medical information to mask the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://seumenha.ru/123?utm_term=how+to+treat+metabolic+acidosis+in+neonates PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4422150/normal_5ff67fd31e0f6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388063/normal_5fc9baa783da4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371814/normal_601d22fe8ecda.pdfIn PDF document text
    • http://bejuzoz.iblogger.org/talufo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491433/normal_5fcf8837afa4c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404512/normal_600440a61b4c6.pdfIn PDF document text
    • http://allostar.buzz/video_converter_online_to_mp4st8f3.pdfIn PDF document text
    • http://openplafond.xyz/balanceamento_de_equaes_quimicas_9_ano258hd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384484/normal_60174001956ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414680/normal_600a565333da6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392193/normal_60215bef7e6a3.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/nolarifaforuxop/25123183618.pdfIn PDF document text
    • http://jawegoxizifiti.epizy.com/free_call_of_duty_apk_data.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/56090172300.pdfIn PDF document text
    • https://s3.amazonaws.com/tiluwisulepam/nolenerenabi.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxalowafokuvo/defuvuvofekofu.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/kevenonafab.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/adverbs_and_its_types_exercises_with_answers.pdfIn PDF document text
    • http://xulodolab.epizy.com/nadamejunopoxig.pdfIn PDF document text
    • https://s3.amazonaws.com/boxujetanonikuv/gorulesebikolizamuj.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/ccna_4_chapter_1_answers_2017.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_off0000e2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2B9 5276 bytes
SHA-256: dde8a393f76cece9fc9c6a1223b26215b8c72c7ae9a9b05d004592fa53543f2d
font_01_sfnt_off0000f49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF49C 11852 bytes
SHA-256: 4eda2333ae1329c321113ffa709dea93811f4db8f96a1ea6f502ddf67569f050

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