Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef0e1c8c3f41d73e…

MALICIOUS

PDF

77.0 KB Created: 2021-05-31 09:36:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ac98b62d50b8226a7b1f58f27c1bf6c1 SHA-1: 2138592d164fa634d02f0381413c3f4be0069a7f SHA-256: ef0e1c8c3f41d73e8df8c0de0c0e4b405e4040dddb053c0af399cfd201f36ab7
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/123?utm_term=front+office+agent+interview+questions+and+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4388596/normal_5ff325f11e4fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454807/normal_5fc735284aae2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384647/normal_5ff52f43acf56.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498868/normal_5fcf3d89990e3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421461/normal_5ff9a78cbe88c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_6043491e56e95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491414/normal_606061d487736.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383582/normal_5fd07117d11e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451753/normal_6037b9b9957f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486743/normal_6052edd416590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409092/normal_600e0a23c564b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa3b2db7-01d4-4f23-a33b-4926c0b5c287/lean_muscle_body_diet_plan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69a31e9f-b63c-4f6a-8de8-469ef0fb6077/jiwibutawasiwowadus.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87d9493a-9bb7-4bd2-9a96-2321548b3aec/rafimasezabitokuviwikotiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a58750c8-55a9-4a37-822a-64269892bb25/civil_law_vs_criminal_law_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78059eba-8647-4add-affd-3a0b2a02d679/87695621597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/63497325-3e5d-418a-b53f-b9dbc8310396/uk_lunchtime_teatime_prediction.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e923bebe-3893-4e7b-8b43-eb092b2305bb/bukinirikoteginigisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9bee62-abed-4e56-b801-d6b667a0041e/14548331400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72284f61-b66a-4466-acce-c8db952184c2/english_grammar_exercises_for_advanced_students.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47bf8ffa-e75e-480c-a871-7de1477013dd/86468888271.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/757ac458-22c9-4a0f-b07f-fde51af401f5/8119706594.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/530e8602-bc23-4b1d-bc40-ccc94d1895ac/how_to_use_the_shark_handheld_steamer.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_off0000ef7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF7D 5392 bytes
SHA-256: b6898c2bf7db0fc83abc04b30838e3499b4c80eba188f478b0db0e9f8dab70ce
font_01_sfnt_off000101f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F5 10596 bytes
SHA-256: 883d5e33e2c3c42d7083c298974c01b00fe2c96756b6753933159d0b1d07570d

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