Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef065da56485484…

MALICIOUS

PDF

74.8 KB Created: 2021-07-08 20:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f83aa08ffdb2ff2b4075d3d76464b1b8 SHA-1: 2a7ad67c40942a71217faa2f3489bb3b3567e74f SHA-256: 9ef065da56485484ada9ca9ee91841bbaf965c90c4bb0255581356759f217814
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links pointing to compromised websites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the nature of the links and the PDF structure suggest it's designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 https://wastran.ru/uplcv?utm_term=exercise+on+comparative+adjectives
    • http://ahxxzx.com/userfiles/202105/file/1835546417.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/13m2e6qjlmv7cr2an4scvo9fdi/xexegusofatefulif.pdf
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/1g9557pjdilf5uma1ono1ccf9s/bagowenolugejokosikefewi.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/28522353675.pdf
    • http://igigeothermal.jp/userfiles/file/xejivasorigij.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ebb92520b0---tajiril.pdf
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad46c9a812---foxititewosebax.pdf
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd25e45f9e---jozepunokuvukobepori.pdf
    • http://nacyc.jp/Upload/file/zamufozitelolexuza.pdf
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e1b10e57f2a---winobunomamub.pdf
    • https://bhandarisurgical.com/ckfinder/userfiles/files/54839127568.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a5d6e0a9be6---82075504003.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0b58c7a82---xupawosaponekun.pdf
    • https://bandai-k.com/userfiles/file/ferutinawafefujukudaname.pdf
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/bbb53379beedcb91c174b6d21385d77b/88402536129.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608035b8afb04---wizofuvukumotan.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868ceaab7b8---bibivorunedukedotax.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d55a965f3e---nirozuge.pdf
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/7df758c451f7fe33508cdbca72e5ceb1/wejekededosajevon.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ebeb82d126f534d0d735c0401116f39/javelazivixovakosi.pdf
    • http://casaledellasignora.it/userfiles/files/50944371148.pdf
    • http://weddingdiy.cc/uploadfiles/files/20210616_063354_4454.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c168.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC168 16792 bytes
font_01_sfnt_off0000d97f.bin
733087927731dd842dc4a024ae3e15fd393bfa191f1ecb4598b37ec059fdc8b7
pdf-font-stream PDF embedded font (sfnt) at offset 0xD97F 10912 bytes
font_02_sfnt_off0000f2bf.bin
4cbd4f124b06af6151ecded1be14ffe5ec1fa1175abda70733d4dd7768ec0f64
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BF 16272 bytes