Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5bc5b97b877e366…

MALICIOUS

PDF

87.7 KB Created: 2021-04-11 07:50:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 31ce5ec8b07b7b76b06a6a9cd338532c SHA-1: ce8cfee7b6af561ab719c478b4f313d7e010581e SHA-256: b5bc5b97b877e36643342ec5398ed9f3dc95ec2cbce229d6267c2faf74337503
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a high risk score. It contains an embedded URI pointing to 'https://maypoin.ru/strik?utm_term=garmin+gps+78+manual+pdf', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains metadata related to PDF creation and potentially search terms, reinforcing the lure aspect. No scripts were extracted, but the presence of external URIs and the overall malicious verdict strongly indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=garmin+gps+78+manual+pdf PDF link annotation
    • http://pebonemariv.mypressonline.com/93581051835.pdfIn PDF document text
    • http://xevedudox.sportsontheweb.net/zobilidemofitiloseni.pdfIn PDF document text
    • http://mekujoviwe.mypressonline.com/vimuwiganojavinonunolijel.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/vososasoxumete/ny_daily_news_sports_reporters.pdfIn PDF document text
    • http://ziwemasux.myartsonline.com/32125702113.pdfIn PDF document text
    • http://piwakitidi.onlinewebshop.net/xewatizaraduja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c97806-328a-4169-8070-0236cadee621/fourier_series_expansion_matlab_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3a3952d9-8e68-4e6d-acd4-b79ba6b3fb19/pegimalur.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/frases_del_libro_el_mundo_de_sofia.pdfIn PDF document text
    • https://s3.amazonaws.com/gebukil/volorarosudamanalugavex.pdfIn PDF document text
    • http://nizegabimuremiv.rf.gd/digedikiwolasexegimati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86199465-70ab-4223-bfc1-7d51fa05386e/jagobibazepenobax.pdfIn PDF document text
    • https://s3.amazonaws.com/befafuni/identify_pronouns_in_a_sentence_worksheet.pdfIn PDF document text
    • http://wobadumiravolu.atwebpages.com/requirement_analysis_in_software_engineering.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f243e2bd-09b9-4feb-b01a-02081ca2d854/nietzsche_gay_science.pdfIn PDF document text
    • http://mirajiletumumi.epizy.com/dotemadoladulomezos.pdfIn PDF document text
    • https://s3.amazonaws.com/sasufufa/gelolisaf.pdfIn PDF document text
    • https://s3.amazonaws.com/nutanigonu/76607319746.pdfIn PDF document text
    • http://tesuzegijibonu.epizy.com/roasted_vegetables_and_chicken_sheet_pan.pdfIn PDF document text
    • https://s3.amazonaws.com/wujixus/excel_microsoft_online_training.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/dance_basanti_remix_song_pagalworld.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/midojube.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_off000118ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FF 5664 bytes
SHA-256: 55970d268f2f082d0418030301a34789fdee5ed1d375af08beb06f949be7adcd
font_01_sfnt_off00012c33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C33 11016 bytes
SHA-256: ffa3906d3f486a50a22dbef5aed0e5fc21d22503e3c6ab129c369142c3b55df7

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