Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c5e75ee260fd3d0…

MALICIOUS

PDF

74.1 KB Created: 2021-08-29 12:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1a376e157c0b553f3f7c53279c16a4a SHA-1: f4881c42adf0fae1673a8d878744020753276835 SHA-256: 2c5e75ee260fd3d097e230e8f5f953dbd4bb59e7c2d48181e4cc3ae4793a590b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is designed as a link farm, likely to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://perfecthospital.org/ckfinder/userfiles/files/xawatixegetudisazidurumev.pdf
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/3390c3a6c91c52dc33db95c0c7d89c78/kakenapoku.pdf
    • https://ltssinternational.com/res/wysiwyg/file/sifafa.pdf
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/a76b43b6a695750390efac18b03fa8b7/xigaxaludaliwalovinom.pdf
    • http://ahlhy.com/uploads/file/011553567689.pdf
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/jokv7m14q4ina739j0bqobbfe3/2097300486.pdf
    • http://burmeseburmilla-allevamento.com/userfiles/files/gabulapejutenusosodadin.pdf
    • http://hutergroup.de/userfiles/file/lapofawulijuga.pdf
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/92991bfaaeaf7ee8badad98082c26b03/45999655649.pdf
    • http://lafayetteconnections.com/clients/52818/File/bixipo.pdf
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/3cu12cclnadb7jujj3m7kn54ff/buxozorenukawujabifole.pdf
    • http://geose.ru/userfiles/file/30228380961.pdf
    • http://patrick-vallot.com/upload/files/12499057670.pdf
    • https://luminex.pl/upload/file/lusezatusonekoviru.pdf
    • http://litho-and-co.fr/ckeditor/upload/files/rasularafejaviluvevileno.pdf
    • http://ayurveda-shiatsu-nice.com/upload/files/37492994685.pdf
    • https://securitydm.com/slicice/file/sidozefuwirejareza.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/16083fb1917d0d---65162636977.pdf
    • https://ddtoyz.com/ckfinder/userfiles/files/tarepixelidagutozewesu.pdf
    • http://ilksolar.com/Images/Media/files/pirizenudus.pdf
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105a20e0116a---mebebo.pdf
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/9701e52ca1ff429575145540c495a2ff/fiworogu.pdf
    • https://catwalkdogcome.com/editor_upload_image/file/75100190153.pdf
    • http://signaturecruise.com/js/ckfinder/userfiles/files/35187167415.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=coming+together+and+holding+together+federalism
    • 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_off0000bfc6.bin
7b27642c7a8ff4eb3637b7ac6283dd46fd6cbe153ccc4c99147328a3a5632fe1
pdf-font-stream PDF embedded font (sfnt) at offset 0xBFC6 16044 bytes
font_01_sfnt_off0000e89f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 16792 bytes
font_02_sfnt_off000100b6.bin
c7851e0b7d9d379a6cbef06a839e80b5f411339f1275f66b0c87d681077c988c
pdf-font-stream PDF embedded font (sfnt) at offset 0x100B6 10832 bytes