Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0159adb61ed8851…

MALICIOUS

PDF

70.6 KB Created: 2021-09-26 03:15:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5746d3e7ca1905747b5fef29dff202c4 SHA-1: 126d2875341d65ea3bcecbce73b0604a590437bc SHA-256: e0159adb61ed88513e6f2333136c8c4e9207209be1a1d0a915f799e6e9d9b808
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ML classifier and the 'Password-protected archive handoff' heuristic strongly indicate malicious intent. The document functions as a link farm, directing users to numerous PDF files hosted on potentially disposable domains, which is a common tactic to obscure malicious payloads. No scripts were extracted, but the overall structure suggests a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 5

  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://jubileejec.com/userfiles/files/35702355432.pdf In PDF document text
    • http://ciccioinpentola.com/userfiles/files/55396843073.pdfIn PDF document text
    • http://mawratanews.com/armedia/uploads/files/72165472167.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/fenivedozuxipilepepa.pdfIn PDF document text
    • https://rawoctane.com/uploads/file/68468399446.pdfIn PDF document text
    • http://bandbaajabarat.com/ci/userfiles/files/fegiga.pdfIn PDF document text
    • http://emannsltd.com/userfiles/92334052880.pdfIn PDF document text
    • https://medpressa.ru/files/file/bukopojiman.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/49342753082.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/diwawaporupebuzo.pdfIn PDF document text
    • https://clearpatth.com/userfiles/file/bidasadow.pdfIn PDF document text
    • http://goldcoil.com/uploadfiles/files/26793377057.pdfIn PDF document text
    • https://mayxaydungthienlong.com/uploads/files/files/848839301.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/54671770300.pdfIn PDF document text
    • https://myreply.mobi/snappshott/editor//file/3560393801.pdfIn PDF document text
    • http://maidichike.com/upload/files/19960756624.pdfIn PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/161354ca2178e3---35253245325.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/zeserineperaxozezedopi.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/jopenevulu.pdfIn PDF document text
    • http://domkomplekt34.ru/attachments/file/90736801786.pdfIn PDF document text
    • http://bancasemecanino.com/userfiles/files/34500434311.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/33800835197.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/gazasegodebutes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=cool+games+for+androidPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1E7 16844 bytes
SHA-256: 9b20573c37792a85597d7bd70f77753f2fc4063ccf91df826116f64a50cd62ec
font_01_sfnt_off0000dcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB1 10628 bytes
SHA-256: be377ba8c38cea734851d0eb601b0b740541a1e9a5e6c1b94d0fc37b8d604f60
font_02_sfnt_off0000f4c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4C4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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