Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1ada48c46045561…

MALICIOUS

PDF

92.3 KB Created: 2021-07-06 21:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 67232fe909b43a8b8f7b1efd048709ac SHA-1: 69169732876045bea44ff4e43ed898e2c24580b5 SHA-256: f1ada48c46045561cd6c0c71d530c5127a659f41d4240e5bb9128a6fcc2df030
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://garglob.ru/uplcv?utm_term=like+some+pages+in+used+books+crossword
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/66d0f5dc824fe393c629844221480e1d/78850714835.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dba28e645d8---71716887722.pdf
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f88bbccfc107e90c8d58a5837b65e079/58244524600.pdf
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160864aa21fcb8---bomokapulajezan.pdf
    • http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083328c114ea---76350125841.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8559e1d71---kabolikonepebinabirobifi.pdf
    • http://tasarimak.net/ckfinder/userfiles/files/fapigomobixe.pdf
    • https://allcreaturesinc.com/files/files/19267104540.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1607263d4c2cea---17923622481.pdf
    • http://architettodrabeni.it/userfiles/files/wokajozim.pdf
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609eed25c1fd0---xisazikidug.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/721ac620fdb92519012a8b840677c560/99485703582.pdf
    • http://splogservice.ru/content/file/45581343130.pdf
    • http://onlineexpert.in/userfiles/file/roroxanifuxarufodin.pdf
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/dfc94e41d4c7ab13a4534669c78b09ee/57032719926.pdf
    • http://alnoorcity.com/userfiles/file/74843083157.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094435f63a99---mixebofozuzaba.pdf
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16087b3182bfab---xafipe.pdf
    • https://binarbaidservices.com/public_html/userfiles/file/pexegivokokagezizuruj.pdf
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/5bd29c20f4c695d954742aaa8f717b77/winowaxajomirevomupek.pdf
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090349d26504---fefevabowulijo.pdf
    • http://autodilykanka.cz/cmsimple/images/file/99609561569.pdf
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/c9f3c2fa2aa3e2200c0bc5119275f888/28953929225.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/pjm82gfeadqjtcotmrd4223314/73623990794.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_off00010387.bin
2757827beb831ec794d5df6bd157aa9b3b3f9580bb3b0c1de355ad83ba4d50e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10387 17288 bytes
font_01_sfnt_off00013076.bin
dc366424770a1ccd84d75019ae4d7ccf81cc376ea17308c1cc15ead8c94cabe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13076 11088 bytes
font_02_sfnt_off000149ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x149EC 16792 bytes

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