Malicious PDF — malware analysis report

Static analysis result for SHA-256 e712712cb365e390…

MALICIOUS

PDF

74.0 KB Created: 2021-09-29 03:18:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 72d5fbbf3429f50b5684ff533801fa91 SHA-1: 239a3292826fa3da85512e0c978f9a00131db3f8 SHA-256: e712712cb365e39082f0ce9937c71fdaf56bdd43b284ea32e7700e62610a967c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites and disposable hosting, designed to redirect users to malicious content. The presence of external URIs and link farm heuristics strongly suggests an attempt to lure users to external malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://infrive.ru/uplcv?utm_term=google+account+manager+6+frp PDF link annotation
    • http://mentaplywood.com/images_upload/files/23558436420.pdfIn PDF document text
    • https://morganmethod.tuesdaytrader.com/ci/userfiles/files/52204587390.pdfIn PDF document text
    • http://www.syrahresources.com.au/application/third_party/ckfinder/userfiles/files/52089008855.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/kosafutepemojujewaxe.pdfIn PDF document text
    • https://7foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/gilifadobodikezibolatu.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/161337a43c202f---xurubox.pdfIn PDF document text
    • https://bold-iot.com/uploads/files/202109131733518582.pdfIn PDF document text
    • https://xn--80ag1a2a.xn--p1ai/files/file/65983218706.pdfIn PDF document text
    • https://techlan.pl/files/file/fizav.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/qj17cfp64apojpqce5t36iug5g/zuwexenorupijesisi.pdfIn PDF document text
    • http://bsl-trans.ru/admin/ckfinder/userfiles/files/xepukojerizunadiru.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/gusikose.pdfIn PDF document text
    • http://puginternational.com/ckfinder/userfiles/files/ruporibidew.pdfIn PDF document text
    • http://monticellotownship.org/userfiles/file/kudeselekadoti.pdfIn PDF document text
    • https://yumasri.com/assets/ckfinder/userfiles/files/75989196067.pdfIn PDF document text
    • http://begemot-rus.com/uploadfiles/file/2021090108001173499.pdfIn PDF document text
    • http://jiuxingchaoshi.com/uploads/file/171052517967.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b400f00dc---fijenipapof.pdfIn PDF document text
    • https://orangerun.re/photo/files/50163218687.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/53726648689.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613b180a74e17---sajilazapajovozokomunix.pdfIn PDF document text
    • http://cdkuys.handysociality.com/upload/files/situm.pdfIn PDF document text
    • http://skupka23.ru/upload/m/wewenitopisaka.pdfIn PDF document text
    • 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_off0000b90b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB90B 18544 bytes
SHA-256: 85c4ce6b2526a113c000b720c241713761a7ea9a5e06877cedd6fd5c9d153848
font_01_sfnt_off0000e903.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE903 10868 bytes
SHA-256: 7de55dce21fcb5286a5bea99a1b953e324d359bfc2fa8879632be4a1a9ea1155
font_02_sfnt_off00010234.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10234 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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