Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f41d84bcbf3717a…

MALICIOUS

PDF

83.0 KB Created: 2021-09-04 12:09:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 190f0118a9a21340eb8f9a0b1be169d3 SHA-1: 3a8221231a4948d9ff285e0b40d4c3096be3b138 SHA-256: 6f41d84bcbf3717a449889e4884920f8932bc9dd22c067dfe3bfda175b299b13
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites and using SEO-related URL parameters, indicating a phishing or scam attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely to deliver a secondary payload or lead users to a phishing page. No scripts were extracted, but the PDF structure and URL analysis point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb72e3a48b---pegar.pdf PDF link annotation
    • http://autobedrijvenindex.nl/images/uploads/37746768867.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/9ec8ce55495f6913176a8fbbeaa33607/moxifik.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609886370f837---mewiwewunumatozu.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/savavunavevorasilajev.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/75d66a367ec072993e3b5e6dff47fd6a/fatulesurawinigiximerotit.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbbe998bb2---lutijikomemukam.pdfIn PDF document text
    • http://mldinsaat.com/image/files/lofejowulotubakora.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/7vd5qu8hokfjstsg7866cm5550/43781046595.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5b89f7f286150bb39f9f7fa787bb2899/95434390278.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/a16cffc361bd33e0232a4ad8c6bc0aca/jakifirulumel.pdfIn PDF document text
    • http://fizjoactiv.eu/Upload/file/84611062075.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7516e784a---22936922719.pdfIn PDF document text
    • http://aktasmatbaacilik.com/resimlerfiles/78348689600.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fb92c424df---gubusater.pdfIn PDF document text
    • http://cesurmakina.com/userfiles/file/lowajenone.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/vilaselamiviga.pdfIn PDF document text
    • https://www.albispanaderia.com/wp-content/plugins/super-forms/uploads/php/files/4c424bceb969a4076d9004e47bb52f23/47574361467.pdfIn PDF document text
    • http://ejmk.com/ej/upload/files/74020245542.pdfIn PDF document text
    • https://khanikango.in/file/21223609915.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093425d77beb---87466898648.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/90977753474.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/3a20bebcbe12a04407dd3bdaf00b5b64/savanulanuji.pdfIn PDF document text
    • https://penal-garazh.ru/files/45600923499.pdfIn PDF document text
    • http://renovator.cz/files/file/wezipa.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a47a3998eb---98758917895.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=scientific+method+testable+questions+worksheetPDF 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_off0000e0f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0F7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF909 16268 bytes
SHA-256: a7abf9acbab38cecf8182beacc55b42ad304305f11eef07c52aa7778d589e53c
font_02_sfnt_off00012326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12326 11380 bytes
SHA-256: d6bc67577e2fe60b40eb5e424ea00e8ccf4d09ad41a3a5f9ee3a6889baa05e8d

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