Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b1c5f0c6ee8173b…

MALICIOUS

PDF

81.0 KB Created: 2021-09-18 03:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e2ccfa2aad5260beb62c6b57ae55fb2 SHA-1: 1c0134bf942b77d2154fa1eec33905507d5bec8e SHA-256: 0b1c5f0c6ee8173b53e63de9d87aa5b1432db0537acd1d866949ec0bfdf5cdde
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating it's likely a phishing or trojan delivery mechanism. The document functions as a link farm, containing numerous URLs pointing to various domains, some of which are hosted on compromised CMS platforms. These links likely serve to redirect users to malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://philabc.ru/uplcv?utm_term=kamasutra+book+english+translation+pdf+free+download
    • http://lovesenergy.nl/file/37253768368.pdf
    • http://pc580.cn/upload_fck/file/2021-9-18/20210918051124748264.pdf
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130dd6f62adc---fatezabajavafavulug.pdf
    • http://magooferta.pl/uploads/fck/file/fogojedol.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613094f810af7---maxesifowotivipipuzez.pdf
    • http://wmc21.com/ckupload/files/tojunojo.pdf
    • https://vibangnhadat.com/uploads/files/20795815383.pdf
    • http://escuelasfutbol8.com/docs/files/sulosalunukazap.pdf
    • https://mantyobras.com/userfiles/file/58470621546.pdf
    • http://ipai-bg.eu/img/file/puvegena.pdf
    • http://atenngo.com/admin/sites/site/documents/94840161447.pdf
    • https://bdprescription.com/ci/userfiles/files/nofana.pdf
    • https://uppersanduskyrotary.com/cms/files/File/67482448484.pdf
    • https://bluetact.com/locktactyuma/userfiles/file/70157843075.pdf
    • http://tradeweb.es/userfiles/file/5945379635.pdf
    • https://homeaestheticsllc.com/wp-content/plugins/super-forms/uploads/php/files/d429dbac5f5885440e2135e345c56e86/faxuwitevupipepagenema.pdf
    • http://kaupa.cz/userfiles/file/pogoxabuw.pdf
    • http://savalis.ru/userfiles/file/dimuzazisesatifiwoz.pdf
    • https://stotex.rs/files/70379302275.pdf
    • http://lawyermo.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sodunaduxegugewaladi.pdf
    • http://gzbaosui.com/uploadfile/files/kipibawezikakuwilu.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_off0000d641.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 16792 bytes
font_01_sfnt_off0000ee58.bin
848d5ed507cb5c4184e40e85557f20c15b50fb59ddff6930bdf32ddc21fc658b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE58 11356 bytes
font_02_sfnt_off0001087d.bin
bf961bb39c3bd102dad16354617407a4885de54bcd383ebea052df5226c13173		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1087D 17496 bytes

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