Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e7891047b2e3e3a…

MALICIOUS

PDF

103.6 KB Created: 2021-09-04 06:57:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 2d6b201166bd01cd3ca83d4a53999669 SHA-1: 5e3e55d3285595136f94aac3c2a715f79ab1b3b9 SHA-256: 3e7891047b2e3e3a3d18717cb47d3d528b3da61220a53aaa938fba80d3c18891
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs pointing to compromised WordPress sites and disposable hosting, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the download and execution of a second-stage payload from one of the provided URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://sevenseahotel.com/uploads/images/files/godezarizusizud.pdf In PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b892d40d4---poludixadiwis.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b49daafa91---48401848376.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072f3223ffc5---wixamopin.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160ae44b313dbb---41524888036.pdfIn PDF document text
    • http://co-wemart.com/careeruserfiles/file/96502806022.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/cc3efffec4c530e833229220b567e526/70003058344.pdfIn PDF document text
    • https://linlinline.biz/js/ckfinder/userfiles/files/rodijuseziwezujenapa.pdfIn PDF document text
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/v6o3hcc59e78pj1rivh49nrjv1/19198231005.pdfIn PDF document text
    • https://atpl.aero/ckfinder/userfiles/files/98927115220.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/33e80b8dc1d5f648aa48b50261e26782/48112520728.pdfIn PDF document text
    • http://mygiftltd.com/userfiles/file/35299358802.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/10017523372.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1610a1b7ae2878---nemajatidagasixunefitu.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/55df34c3d3920ef8daafeaa56064874a/vupetowaxilogivikugik.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/66676212098.pdfIn PDF document text
    • http://emilymillerlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/9225841072.pdfIn PDF document text
    • http://ghibms.com/userfiles/files/zevalizemisagozoroxeb.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///59693092369.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/222aa4558e7c5fd3e331057478e3f957/pizafonaper.pdfIn PDF document text
    • http://foto-video.ch/userfiles/files/8102222351.pdfIn PDF document text
    • https://bya-ingenieria.com/ckfinder/userfiles/files/fiwipunibabusizizawenup.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=dsm+iv+pdf+portugues+downloadPDF 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_off00012a80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A80 20412 bytes
SHA-256: c5349dd1b1495f36f74f8c33f1b2c61d4a90f44ccd918c89d1cb1834decb39a3
font_01_sfnt_off00015f41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017758.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17758 11096 bytes
SHA-256: 6184f1c80854154124b41722bda845d83ff9de9ca690fbb4a048a3061dd9ee20

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