Malicious PDF — malware analysis report

Static analysis result for SHA-256 03e454698cac1364…

MALICIOUS

PDF

71.0 KB Created: 2021-06-03 05:07:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 21c1e3b2f030bdcd362d3659b32ec526 SHA-1: f62b198f4816876f3d45825be8b30a533dd7dc0d SHA-256: 03e454698cac1364088237b4542cf3040f649bf409c8e4487f3aed7afa8ebfad
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'wastran.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains references to 'Kaltura capturespace download' and 'walden university online', suggesting a lure to trick users into downloading a payload.

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://wastran.ru/pbw?utm_term=kaltura+capturespace+download+for+walden+university+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403413/normal_6052b51d317d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401525/normal_600fbee22af77.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387581/normal_6068c7428b3eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490141/normal_601fc5b508b7a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422148/normal_6059a2bf21235.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4369343/normal_60b237c4212da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411480/normal_606846c626c2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454559/normal_60198eec65970.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taxexuwej.pbworks.com/w/file/fetch/144434670/wibewugalafavadir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d32409d9-60b7-4b7f-8a44-272a8663b62c/how_to_make_a_3d_skin_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd27ee3-e71e-47ef-8244-4063ca544b02/narezenuforusalamibe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f7de485f-cbe1-4d53-b0d5-a19d92d97587/52494305083.pdfIn PDF document text
    • http://wevapejatu.pbworks.com/f/bisizagupibixelezorub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e3c443b-8f7a-466c-bb53-d4f0b246da3f/quran_translations_compared.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6485c0f-cc0a-465c-9681-fb9aa33d3cf8/how_do_you_read_a_schumacher_battery_charger_meter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce72a567-505f-4bd4-9920-d7ba40567555/35450624921.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_off0000d841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD841 5372 bytes
SHA-256: 92469cc972674008977ad1e35d3f960858b91e2cd8d831140e656ae515ac9c04
font_01_sfnt_off0000eabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABC 10520 bytes
SHA-256: fb25494b0073dfa3cea4d8bd38162090ec810adedf47b2c73ae0a8d1ba21a57f

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