Malicious PDF — malware analysis report

Static analysis result for SHA-256 efe7760148c0a4b6…

MALICIOUS

PDF

151.0 KB Created: 2021-06-26 16:10:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cdea5f7b6480f9262fd692e0b79c2277 SHA-1: 9e6ffd40e5b6951832847dddc0dc96679d8baadb SHA-256: efe7760148c0a4b6a27e16f1401ee2999752266ca3e74c0c7de81b11c7234e6a
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing numerous links to other PDFs hosted on various websites, many of which appear to be compromised. The heuristic 'SE_INVOICE_LURE' suggests a fake invoice or payment lure, and the ML classifier and ClamAV detection strongly indicate malicious intent. The embedded URLs are likely used to distribute further malicious content or lead to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9920

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://smidgel.ru/uplcv?utm_term=civil+procedure+code+pakistan+with+commentary+pdf
    • http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/fusiretivunazijovakakovu.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/f4b8960e8b284c1ea7a17368b254d957/47102820944.pdf
    • https://daluxerealty.com/wp-content/plugins/super-forms/uploads/php/files/3i9aa12gqs8p68nhkekd2n9or0/zefobarer.pdf
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d25b54514f---80507182193.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/4051f55224b27b927c646912194c7dc8/liguvopofobetarubabitut.pdf
    • https://agrilaui.com/userfiles/file/kuvinijetutokinun.pdf
    • https://nationalshield-uae.com/userfiles/files/zegateluvan.pdf
    • http://stphilomenaonline.org/userfiles/file/55423209201.pdf
    • http://epoxidice.ro/mm/file/95729985222.pdf
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160ace6b822b5c---33482901391.pdf
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef73d09b74---98932666503.pdf
    • http://onlinemidias.com/ckfinder/userfiles/files/92893767734.pdf
    • http://hayatteknoloji.com/webimage/file/95178002596.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/203da4ad51091b315a1e094a37868207/15654035075.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b153805c0a6---judex.pdf
    • http://phenix-security.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160771fe0c1de5---zumubekasipi.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/40d2a5754775fdbed953caf630321e28/sakuzekopusakesigivenowe.pdf
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/p3ov01nf17e9uu8jh5o0bfltva/vijevuf.pdf
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c04b3a85c7a---rumegakorebasexan.pdf
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609bc2a37f086---81881038022.pdf
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075d0be80f04---liweregoketefeturi.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/8bf50c72118fe857e70777baba8cf924/pigogujil.pdf
    • https://aydin-elektrik.com/resimler/files/suwavefijobakamimori.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e6f1.bin
704a81a03d16b7fd99ef6cff5ab877334c62e9157b2b9b1a2a244750a20140df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E6F1 11372 bytes
font_01_sfnt_off0002019b.bin
edc897b464144c782a3e4a0da94af3be5e5d80f170dac51d72d3445c30c7f207		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2019B 20048 bytes
font_02_sfnt_off000235dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x235DD 16792 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.