Malicious PDF — malware analysis report

Static analysis result for SHA-256 402277cff28bc843…

MALICIOUS

PDF

78.1 KB Created: 2021-03-17 20:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: df1dee06b026eaec1b4172cd56e5d534 SHA-1: 0c820819e79b5ccc72a1aa9acb7c6af8a5b05318 SHA-256: 402277cff28bc84356014d0ded762f721e61160abf3f631c9e0957f8eaae9993
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI are indicative of a lure to a malicious website, likely for credential harvesting or further payload delivery.

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://botokaw.ru/award?keyword=acromioclavicular+joint+sprain+exercises+pdf PDF link annotation
    • http://nesegejisivinu.medianewsonline.com/86919102103.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378160/normal_6043194414a6d.pdfIn PDF document text
    • http://useraisins.pro/67615363425eujdb.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/gelegekudinibizukefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454421/normal_6014836624b5e.pdfIn PDF document text
    • http://sushibara.net/fundamentals_of_database_systems_7th45kns.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454822/normal_6009d8b3516de.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/vabemavuputenif/spider_solitaire_game_uptodown.pdfIn PDF document text
    • https://8772a198-af03-49ef-8724-5feb7546cb8a.filesusr.com/ugd/436f04_f10951218be54ad5b7ad81bdbf44f437.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sutawowirosuvuv/pudodijat.pdfIn PDF document text
    • https://434dcbc4-7bd9-40fe-99bf-e102daebf961.filesusr.com/ugd/07ef24_6c25ad7f93364663bf991c1aa7140ac1.pdf?index=trueIn PDF document text
    • https://c83cbd6e-a134-4b49-ba12-49f24c654ad9.filesusr.com/ugd/904a8b_6a8d9bec4bdf444e9ffb278131198d40.pdf?index=trueIn PDF document text
    • http://nisetekotixob.myartsonline.com/31755771564.pdfIn PDF document text
    • https://968bac2e-1409-45a7-bd11-2c37eba47390.filesusr.com/ugd/c81504_d890877f90964d4e8d3e27c385b12c2f.pdf?index=trueIn PDF document text
    • https://167c8e7b-8160-49a2-a88e-f26749d647c8.filesusr.com/ugd/1ad47d_ca03cc0d9bf74d808136ff71d983a82d.pdf?index=trueIn PDF document text
    • https://0e8f88b9-656e-4b05-9cd8-8bd477f85547.filesusr.com/ugd/95b9ea_59a5d746a9f4408a858d6d1752ffc30f.pdf?index=trueIn PDF document text
    • http://pudosuvosav.atwebpages.com/zirininugodopabibiniradom.pdfIn PDF document text
    • https://s3.amazonaws.com/ladiwuzetawedi/69474377630.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/12th_agriculture_book.pdfIn PDF document text
    • https://s3.amazonaws.com/xixonu/27860423094.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_off0000f366.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF366 5496 bytes
SHA-256: eaefbaa047cca53fbfa927d923ab6e18c0b000a8359603bed85110883efd14d2
font_01_sfnt_off00010613.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10613 10868 bytes
SHA-256: ae303d89d2c06067d5062dc9dffdbca3054d5934bca5fc7f94584a0ccb7bc055

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