Malicious PDF — malware analysis report

Static analysis result for SHA-256 12e6e6641cfa49d7…

MALICIOUS

PDF

86.6 KB Created: 2021-08-21 09:07:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 13be920e4d59c75e714c92fc2fe89320 SHA-1: be64bff54777c882b80031c630b5c03ab717e649 SHA-256: 12e6e6641cfa49d7374a3c312fe9a67cfa644aa41e84036f66fe346fa686f33a
156 Risk Score

Malware Insights

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

The PDF contains numerous links to potentially compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification strongly suggest malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/b26c1d8de9a12250b5dedaa92e39b0f2/sefobusulimileni.pdf In PDF document text
    • https://www.herewardcarpets.co.uk/wp-content/plugins/super-forms/uploads/php/files/ui9vu40mepp8bjk96h4vmplm0r/delusozigabaxipi.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16076f74d2ff44---91233916275.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/bujelo.pdfIn PDF document text
    • http://emeraldcovepartners.com/_data/images/file/zipusaw.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/84988875845.pdfIn PDF document text
    • http://mp-journal.com/media/file/lamoriwipazanuwo.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/84747251286.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16100d7fb66ed8---81927537184.pdfIn PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/6c27fa105ee6c42a2aaed911f60264e0/torox.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/78032258036.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/92086423556.pdfIn PDF document text
    • http://chocolatycakes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e32653da24---81911495187.pdfIn PDF document text
    • http://artospace.com/pics/file/nakexiguwotujazuxufos.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/137m8h5la4egfbb9bqlat6062s/zezewibijaxinejolef.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609c81daa6051---79540750622.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///lerejufunuwagiw.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/77351869385.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/fokivoloxavoziro.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160e1ae1e03faa---94842498339.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160916db9a66aa---vumadibofeki.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19173003971.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1610f226bc450b---luguxarux.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/78141884996.pdfIn PDF document text
    • https://autopratichesas.it/file/tizazifevatefit.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7c45791c5---wabazakukiwanemeramag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=what+is+parametric+cadPDF 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_off0000edc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDC8 17936 bytes
SHA-256: 6c2e27c036a44d231c88148fa329407f5164d4563f8a7196536f95bf431a8778
font_01_sfnt_off00011bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BDE 10504 bytes
SHA-256: fdd2b8a9fb41c1126503087703fe75068705023fc64f253cd0b2940b1cb717ec
font_02_sfnt_off000133d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1