Malicious PDF — malware analysis report

Static analysis result for SHA-256 07b29153055aef4f…

MALICIOUS

PDF

83.1 KB Created: 2021-09-13 09:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: a2da94786b443860b776e2d10fce9690 SHA-1: e5aa93cc6b92812b1fe375260e09191e17d0b915 SHA-256: 07b29153055aef4f7ed3ac85d7e747ba44cb8b2d453ddae037f60322fcaba60d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely redirects the user to a link farm, as evidenced by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic and the numerous unknown URLs, which are designed to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dfwarbitrator.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/59198105913.pdf In PDF document text
    • http://48bulls.com/js/upload/files/musojesowifizisiwi.pdfIn PDF document text
    • http://sitarofindiamd.com/userfiles/file/gopoxomenabufoj.pdfIn PDF document text
    • http://xn----otbb6ahq3d.xn--p1ai/ckfinder/userfiles/files/76386493305.pdfIn PDF document text
    • http://templeton.sk/userfiles/file/juboneloj.pdfIn PDF document text
    • http://104408017.linker.tw/files/37456055569.pdfIn PDF document text
    • http://starinviter.com/ckimagefiles/80945814509.pdfIn PDF document text
    • http://marjoleintje.nl/include/userfiles/808752562.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/v4l55fs23af4l309mq0pm6e3c0/gukux.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/xavixofigu.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ee0fd7a339---32135631630.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/43323873062.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/91483155386.pdfIn PDF document text
    • http://studiopassarotti.it/userfiles/files/finimudujateloba.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/dazuxulawasi.pdfIn PDF document text
    • http://z-sinpro.com/upload/files/33388923939.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/50525733359.pdfIn PDF document text
    • https://ckeditor.pamlskovnik.cz/ckfinder/userfiles/files/sazerifewekexininemo.pdfIn PDF document text
    • http://sk4education.com/ckfinder/userfiles/files/nujoxovezupux.pdfIn PDF document text
    • http://flairpens.ru/uploads/files/80255040141.pdfIn PDF document text
    • http://penzion-u-zamku.cz/files/file/bubunajawawupubomojenag.pdfIn PDF document text
    • http://funagamex.vn/PhuongNamGroup/userfiles/files/57474548866.pdfIn PDF document text
    • http://sportschoolindex.nl/images/uploads/gafirobudo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=mejores+juegos+de+entrenador+de+futbol+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_off0000ddbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBC 10892 bytes
SHA-256: ac8df561748e871bd9a751b1931f67e2e8406d58e3e33f95f45fdda290d8eca9
font_01_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 17944 bytes
SHA-256: 3109afb9c27c20017469ca949872fec6931c87ef8b31ebf811dc36a666771ff4
font_02_sfnt_off00012478.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12478 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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