Malicious PDF — malware analysis report

Static analysis result for SHA-256 fba1de895d4ef955…

MALICIOUS

PDF

70.3 KB Created: 2021-09-22 17:48:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53fdebf13eaadfbc799aa691a77b0336 SHA-1: 0de6d582dbf4591370aaf97987a6986998958bef SHA-256: fba1de895d4ef955160636b5c59fad62f97b53e28adc5155307b4936c69bc150
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The ClamAV detection and heuristic firings indicate this PDF is designed to host a link farm, likely leading to phishing or malware downloads. The embedded JavaScript is likely used to facilitate the redirection or obfuscate the malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2573

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://jdjcnc.com/upfolder/e/files/20210906012225.pdf
    • https://absoluteanytime.com/media_file/files/files/83157056735.pdf
    • http://grupophi.es/uploads/files/kuxog.pdf
    • https://pro-biomed.com/admin/userfiles/file/xarogakofezatuz.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/16140e3d65b421---87917336688.pdf
    • http://forepic.com/_UploadFile/Images/file/sizob.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b15d4bdee5caf7101250821ff118f6b/nefozovavox.pdf
    • https://presstone.hu/userfiles/file/lawoxunariwukolep.pdf
    • http://garageanything.com/js/upload/files/pavivom.pdf
    • http://union.travel/ckfinder/userfiles/files/veduv.pdf
    • http://ljjxmining.com/uploadfile/file///2021092219013643.pdf
    • http://195exim.com/datas/files/belebesorugesejilelo.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613e5b7fc47bf---jasep.pdf
    • http://jlm-kg.com/uploads/file/dofirobunejugijuferuxezo.pdf
    • http://nenorm.com/files/files/85937188827.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1613ba4457cbea---koxite.pdf
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/24d632a022e98d4c9fda60986fc91053/29832888064.pdf
    • https://gulf-rope.com/images/bulk_images/files/taviradewipa.pdf
    • http://origo.ws/userfiles/file/73066888916.pdf
    • https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4163af66b8c314e0157754ae9994e004/xuvijojezuxuvilugeg.pdf
    • http://birizgardenhotel.com/userfiles/file/remagififujoni.pdf
    • https://thanaclusterwestgate.leaddeehub.com/userfiles/files/nosojezasunapuvogodup.pdf
    • https://thebottombillion.com/business_school/uploads/file/55415840678.pdf
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161454bdd4027d---mujasojigusezizowapiwo.pdf
    • https://businesslife.com/content/file/72304122244.pdf
    • https://keiba-like.biz/js/ckfinder/userfiles/files/5175122454.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+do+you+take+a+screenshot+on+this+phone
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d9cd.bin
216b61c3cc2ffd66859cb11564bafc249a6446534b28ff3a8b40d9e0204b4766		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CD 10948 bytes
font_01_sfnt_off0000f32e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF32E 16792 bytes

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