Malicious PDF — malware analysis report

Static analysis result for SHA-256 aec6a7c83d824488…

MALICIOUS

PDF

72.0 KB Created: 2021-03-04 20:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e62b06cb922317478e59c7c6dc7a13e7 SHA-1: dd45721a5029b7df57e7de792666d87e92178a2f SHA-256: aec6a7c83d824488cb0a8ce43c7276c44733028bf16b55bcb5a4dc28b813d6d9
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to exploit users by masquerading as an educational document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://zajinet.ru/strik?utm_term=modal+verbs+will+and+would+examples PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384301/normal_5fd60d64d3ee1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366319/normal_6030cff7a4b83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375541/normal_60324b54999e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_5fc61af3b5524.pdfIn PDF document text
    • http://lukisasore.mywebcommunity.org/77628229259.pdfIn PDF document text
    • https://xefolulewonud.weebly.com/uploads/1/3/1/4/131406676/vatem.pdfIn PDF document text
    • http://erkutungotu.com/ek_bahana_song9p1rd.pdfIn PDF document text
    • http://ru-1.casa/wofupogokejagilexej.pdfIn PDF document text
    • https://bakijunida.weebly.com/uploads/1/3/2/6/132695635/6704508.pdfIn PDF document text
    • http://fajiriduxir.medianewsonline.com/bogotaja.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/jasadavebaga/81570802851.pdfIn PDF document text
    • https://s3.amazonaws.com/fedure/4423726985.pdfIn PDF document text
    • http://nigojelur.epizy.com/blumberg_legal_forms_ny.pdfIn PDF document text
    • http://fozosoripivo.epizy.com/formal_and_informal_english_worksheets_grade_5.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/afsana_pyar_ka_full_movie_filmywap.pdfIn PDF document text
    • http://sawesupunozigiv.atwebpages.com/jotunegokatudopixapu.pdfIn PDF document text
    • http://bevonox.epizy.com/antutu_3dbench_7._0._4_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/fikuvine/jibizonagajizewojagoduxu.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_off0000dcf2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCF2 5468 bytes
SHA-256: 0a02cb88a80edaf26ca2f72e2f9dd0b6f4bfd9399f3beac497faa432eaad6cdb
font_01_sfnt_off0000ef90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF90 10408 bytes
SHA-256: f5a298f607adf2facc1a36a6a4c2401384873724eb3d9eae7aad9439c2520586

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