Malicious PDF — malware analysis report

Static analysis result for SHA-256 35702e4a2c36531d…

MALICIOUS

PDF

80.7 KB Created: 2021-06-30 21:14:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f2c107a1222d8e796ad966cd5fb8f7c9 SHA-1: b5a0162698ffdd84c7dd4d0d2f381597706f55c6 SHA-256: 35702e4a2c36531d13373a5208031e2145eb98aec577aee6c0166e1b35ee5bd4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised WordPress sites, indicating a likely phishing or redirection attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a second-stage payload or lead users to fraudulent content. The presence of embedded JavaScript, though not fully analyzed due to obfuscation, further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 7

  • 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.
  • 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://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb52878ca---sipago.pdf In PDF document text
    • https://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/183136218509eeab6793ec71d4164953/43419070726.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d194870a3ed---xuvoxeso.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210502224250234.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c45455040eb---3794447643.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/ftql10bkuiulv90t1pn2n37sfg/10244775834.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0d1bc970e---pemilojesuxoramefose.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff03742c55---nupalipusedopetug.pdfIn PDF document text
    • http://hurtmar.pl/Upload/file/zazifusunabipe.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607363b63a3e9---goxajepedifetomepixen.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/vuxirapafosuradinanateme.pdfIn PDF document text
    • https://vvpta-irvine.org/userfiles/file/rujunabewutukonodawu.pdfIn PDF document text
    • https://harpethvalleyhealth.com/wp-content/plugins/super-forms/uploads/php/files/943a812f860e00eac20493f4c075debb/jesolulamozaje.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/bufadatufokisodi.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086cae714eb4---vobonafexilitozixen.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16094a15b91165---buteratakutogemareri.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/35095975284.pdfIn PDF document text
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/dadg8d1d5kdal9dfcp442ig10m/10665482140.pdfIn PDF document text
    • https://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/07129f9dd2d8009a6d6fa969b6e0b0b7/bevob.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/janowovopifu.pdfIn PDF document text
    • https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/a4fcdea411278f834fb74230891ab4f4/60196690457.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=recycling+station+near+mePDF 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_off0000d753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD753 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF65 17776 bytes
SHA-256: 6136690331c4463ca5ea5f9b925191312a909a9829af9dfa099c40ddcd056447
font_02_sfnt_off00011d06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D06 10732 bytes
SHA-256: c7b13823cf1ab5fd0ad0b75f1beeda0e4cca6f2bf853f3a05e137dd6114af181

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