Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec22d3845a65e50…

MALICIOUS

PDF

77.8 KB Created: 2021-04-30 18:04:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: a0a96e2104712067ea51f1b13af9e94e SHA-1: d97ac6678fb9e1baaaa0df3dcced2aa39e5f9022 SHA-256: 4ec22d3845a65e50f389c72776189538e526590393278bf0a67a0fca9e56a39f
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains an embedded URL that leads to a malicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to contain keywords related to a product sale, suggesting a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=rainbow+vacuum+cleaner+nozzle+for+sale PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386849/normal_60174714b3f71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488349/normal_6005f7668510a.pdfIn PDF document text
    • http://com-free-fire.com/jesopigopazedokixunanumumsb9j.pdfIn PDF document text
    • http://ijmalan.xyz/51504566048k7xei.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451227/normal_600031a645442.pdfIn PDF document text
    • http://palitra-cveta.ru/75625382772fg8ip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472753/normal_601972969755f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460228/normal_5fcbae6b198dd.pdfIn PDF document text
    • http://xteenware.online/nulewuzolivovowo2qhbs.pdfIn PDF document text
    • http://thedefenseforge.com/388418534455scgl.pdfIn PDF document text
    • http://kmplitka.shop/647949364718otev.pdfIn PDF document text
    • http://fastnoutservice.ru/xoxuzumk84rs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451927/normal_5fcba57e1c31d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384036/normal_603e4e4b32e6c.pdfIn PDF document text
    • http://vittorguxx.site/thermador_refrigerator_repair_servicefbo9d.pdfIn PDF document text
    • http://trysoda.pro/how_to_write_a_critically_appraised_topic7ijpi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458833/normal_604ec95970bff.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/kulinisokakewi/liabilities_and_assets_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/billie_s_bounce_george_benson.pdfIn PDF document text
    • https://s3.amazonaws.com/jezekemunidup/android_auto_video_player_without_root.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/dewejinufim.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_off0000f2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2F2 5376 bytes
SHA-256: f04186eb757f4c531cb16dadf243895127ffc7c7d6a9aa7a3814e0d1d9c9ee8d
font_01_sfnt_off0001054b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1054B 10720 bytes
SHA-256: 297b9af7a67b9d1a4aa5a107cb1f2c93905d516299d284ebcf310bf17d639345

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