Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f0ec7ce6abcf81…

MALICIOUS

PDF

77.0 KB Created: 2021-04-11 03:23:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 54b6222bddffb0c4f027af7636d365a1 SHA-1: 6919fef0770ae4af634bb84821ee3c950fec1e99 SHA-256: 94f0ec7ce6abcf81daa61f328cccd640a62dab2e6a275aee7b0df67c5d61900f
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 a heuristic firing indicating an external URI, which points to a suspicious domain. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile indicate the document is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dafemum.ru/strik?utm_term=why+can%2527t+i+write+a+research+paper PDF link annotation
    • https://cdn.sqhk.co/xivijela/HroSij0/kovamepudeboz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425723/normal_604f0d2f129d6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461791/normal_603d2c94d6be9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412762/normal_5fc8ddd6594eb.pdfIn PDF document text
    • https://cdn.sqhk.co/xitilesuxiw/D4jbJXM/90334549287.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401515/normal_60216179a0f9c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382201/normal_5fdf5633654ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424025/normal_605c75cf84c05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367622/normal_604199cb5a580.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416656/normal_5ff405bbeaa4c.pdfIn PDF document text
    • https://cdn.sqhk.co/molavagew/Jjgppha/99762209648.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/gajabedafot/33265937998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8b41806b-edab-4bad-94a8-3244ea7ec966/xufep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9203bfc7-ac46-4b0a-a020-40c39b165e44/muay_thai_basic_defense_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60ec8bb8-f2f8-44d4-ac9b-7428c50137c2/81748982974.pdfIn PDF document text
    • https://s3.amazonaws.com/pobixedele/49971610981.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb5f16dc-1e08-4345-8398-a4489301adb3/world_of_ideas_essential_readings.pdfIn PDF document text
    • https://s3.amazonaws.com/solonebosop/96082336511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6b63914-a888-4c33-80ea-95c72fdc81ac/lupikixowitujubolaveno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d01390-1dee-4ccd-baf4-47ca589b0e15/video_gallery_for_wear_os_android_wear.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/kavawiwifiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d10adb68-311a-4fb1-9505-86ac942b10b0/texatejuvim.pdfIn PDF document text
    • https://s3.amazonaws.com/minabiwa/21807169916.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_off0000ef6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF6C 5228 bytes
SHA-256: 230582de90d7ab51b08c571812ae89b4cb02a9e29370968d76d96baf86d46be5
font_01_sfnt_off0001015b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015B 10876 bytes
SHA-256: c86fd01d3060402c6911dc213602da1022a4903d75735e7d875a630f7f19e5a1

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