Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6c22d314230d71…

MALICIOUS

PDF

83.5 KB Created: 2021-09-03 01:13:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d35f3207cfa58aee7a072e1e2f24bfe8 SHA-1: 05a95599f23f48717915ecc8e47fa153376747ef SHA-256: 2e6c22d314230d71bd5cd2f06418b346c65ca761e00ffaef12fbc41550df0b4c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is often used to redirect users to malicious websites or download further payloads. Several heuristics indicate the PDF is part of a link farm, with many URLs pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://allseasonsart.com/uploads/fck_uploads/file/29295111426.pdf In PDF document text
    • http://servis-hradec.cz/files/file/gabez.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/719c8bf960fbf0d55de797b173fe54ea/xefusalekajafamakinexuna.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160a4af5c0a0e8---97892133916.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c71c2ce3294---ruzivud.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/f878cfe2f69384f8f53903714ba5809e/392208682.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d9e27afcca---49991069787.pdfIn PDF document text
    • http://dobrasekacka.cz/userfiles/file/livirizoveburenino.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/wuwasisorafapuw.pdfIn PDF document text
    • https://healthlantern.com/ckeditor/ckfinder/userfiles/files/wixexegarozowu.pdfIn PDF document text
    • https://elger.cz/fckphotos/file/80980953129.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609423aa1b043---37127357771.pdfIn PDF document text
    • http://maychamsocda.vn/images/userfiles/file/39796832742.pdfIn PDF document text
    • http://aj-logistics.com/stock/userfiles/file/32950252559.pdfIn PDF document text
    • http://www.odnpoznan.pl/fotki/file/file/vedidasusegaxadefepuxetef.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160f13c314e9db---rakonuzaworunekuloxebawi.pdfIn PDF document text
    • http://chongros.com/userData/board/file/nirexufalazilazalalesikop.pdfIn PDF document text
    • http://4x4autok.hu/userfiles/files/bavawirotamododelen.pdfIn PDF document text
    • http://elma-itc.ru/!upload/files/jobixobuvunozi.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b92ce76fed1---92813919279.pdfIn PDF document text
    • http://kingsauto-bar.com/js/upload/files/13754828165.pdfIn PDF document text
    • http://inewbus.com/wp-content/plugins/super-forms/uploads/php/files/repcfkjatchh1mqkr73ov35eg3/73575949387.pdfIn PDF document text
    • http://lokale-uzytkowe.pl/uploades/fckeditorfile/zamutafomasulufulogekosol.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607788657316f---xozejitixafajuv.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9p4ajdgsntfaob6ekm5f0u5c0h/31317878410.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=gary+born+international+commercial+arbitration+pdfPDF 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_off0000ded7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED7 18276 bytes
SHA-256: 46f35cd5af64660c29064d3b92d2f2bd4f0c4e26107300bca142487889a1381f
font_01_sfnt_off00010e9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E9D 10908 bytes
SHA-256: 7f3e20992864a3283ecbbcb8324faa17b3d128eea95a0d058994a64b31663053
font_02_sfnt_off000127a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1