Malicious PDF — malware analysis report

Static analysis result for SHA-256 6967dbc5ea08f3e3…

MALICIOUS

PDF

72.2 KB Created: 2021-09-19 18:34:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1e4039bc87b7b61419e72ac62b9b07bf SHA-1: e8eb5aef00ee1e8db5a8206f635b6fe0a1ee514d SHA-256: 6967dbc5ea08f3e30b8510597bfbc8fbb7034f59af64ad43d1883813fd679569
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to redirect users to malicious content or phishing sites. The embedded JavaScript, while not fully analyzed due to obfuscation, is a common vector for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 https://philabc.ru/uplcv?utm_term=peter+rabbit+2+full+movie+free+online PDF link annotation
    • https://middletonchambers.com/ckfinder/userfiles/files/64338679659.pdfIn PDF document text
    • http://blccy.com/userfiles/files/lidolivebomuserarijufozox.pdfIn PDF document text
    • http://caudafotografia.com/userfiles/files/nujazepixave.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/37191689184.pdfIn PDF document text
    • https://dichvumayphoto.vn/webroot/img/files/nikinufeforixoned.pdfIn PDF document text
    • http://kamnitikamini.si/upload/files/xibokugutupilalagageji.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/452970c3a89856e80cc10385f32dddbf/81913884325.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614628129add5---fotobitejiledagakibezof.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e355c8bfbb---zikiwifaxixewo.pdfIn PDF document text
    • http://viajaconsciente.com/imagenes/userfiles/file/sorelagaguwak.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/17357234913.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/laxoxofilunuwagobu.pdfIn PDF document text
    • http://alda.pl/ckfinder/userfiles/files/92628273959.pdfIn PDF document text
    • https://patriciogaete.com/upload/file/8777103343.pdfIn PDF document text
    • https://lalicorne-hotel.com/userfiles/file/78581403882.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/21778962236.pdfIn PDF document text
    • http://nachhilfeschule.havonix.com/ckfinder/userfiles/files/326163877.pdfIn PDF document text
    • http://shipsupply.ru/userfiles/files/kimokozofawolegijuzuk.pdfIn PDF document text
    • http://biirbeh.mn/images/content/file/12732925148.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/pewuzare.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/98789157608.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a37e03bb7a---93780648776.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/45193193371.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_off0000b799.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB799 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cfb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFB0 10632 bytes
SHA-256: 243d40d304fadc90f3962e2caae3047bd4527aadf979ba180fc421657dbca858
font_02_sfnt_off0000e809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE809 16664 bytes
SHA-256: c01fbc5aa5bc0371f9987d779e462ce1c447108c080ee2db14be359018b47f57

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