Malicious PDF — malware analysis report

Static analysis result for SHA-256 96aae30e0ad3421f…

MALICIOUS

PDF

68.5 KB Created: 2021-09-29 11:16:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 570a249b642eeffa72d37b9e6ad6e867 SHA-1: 9df769fe566fbbfbee060e3df9c5cb943fed4750 SHA-256: 96aae30e0ad3421ff72dde0f9b457207819c5a05d33639e9f1199993c3a82c6b
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1071.001 Web Protocols

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded JavaScript is likely used to facilitate the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://drafthe.ru/uplcv?utm_term=carphone+warehouse+pay+as+you+go+phones+uk PDF link annotation
    • https://radekslodkiewicz.pl/files/file/67838662982.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/83179759691.pdfIn PDF document text
    • http://ed-union05.ru/files/file/lugabivuxepisawe.pdfIn PDF document text
    • http://praguynakorn.com/praguynakorn/picture/datapro/files/61991679827.pdfIn PDF document text
    • https://tfsroanoke.com/home/tfs/public_html/new/ckfinder/userfiles/files/26036650325.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109211018584594.pdfIn PDF document text
    • http://gernano.eu/gfx/userfiles/files/72545798211.pdfIn PDF document text
    • https://kueapem.com/contents/files/xufiz.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/xawepikivogixesefitinagi.pdfIn PDF document text
    • https://primer-spb.ru/files/files/74731393122.pdfIn PDF document text
    • http://sun-eko.eu/files/file/botit.pdfIn PDF document text
    • http://szakkepzosiklos.hu/upload/file/lojilolimidureked.pdfIn PDF document text
    • http://abwingsbuffalo.com/uploads/files/52856747850.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/xazonineperedofaroxorot.pdfIn PDF document text
    • https://ijp2.com/contents/files/jiwazurukaxi.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/pubotokesi.pdfIn PDF document text
    • https://tekmaker.com/upload/files/56603363202.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/161514eb1daa58---88536825588.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/5sv0t89rja5inedkjclgjjqafl/77718347256.pdfIn PDF document text
    • http://www.grifin.sk/files/92135125378.pdfIn PDF document text
    • https://caror.hu/ckfinder/userfiles/files/29917470772.pdfIn PDF document text
    • http://csavarkompresszor.hu/userfiles/file/51458813287.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://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_off0000aca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xACA9 10720 bytes
SHA-256: ba1dad5261821b5f8d41771c49bff14fac236260cf8de4d927c09b92c141e4be
font_01_sfnt_off0000c550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC550 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dd62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD62 15544 bytes
SHA-256: e0d7390f8d60c345e314a3b605603a830d776cefe1f1b6a6376e36332d5511dd

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