Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60fa86ddac6d00a…

MALICIOUS

PDF

96.7 KB Created: 2021-08-12 05:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6123bcc016c52b7c25ca721cd63bc390 SHA-1: 964fc9e3deda55ae86cc44f860415a11b7571c2d SHA-256: a60fa86ddac6d00abcae2a52ad739c621fe2c57f4d6cdfe40d0266e1868ba706
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and a large number of external URIs, many of which are hosted on compromised or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely responsible for redirecting users to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://pixomot.ru/uplcv?utm_term=poemas+en+lengua+indigena+traducidas+al+espa%C3%B1ol PDF link annotation
    • https://studiorampinelli.com/file/58984656566.pdfIn PDF document text
    • http://overtonnation.com/clients/f/f9/f97855507a39dfa58978186db9bff07a/File/xusazuzizojedugadewupez.pdfIn PDF document text
    • https://papiratisk.cz/soubory/tutirelotafolokabixepidol.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/6d5ffcea7a24616c4bc66252ff375951/12589572678.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c2af3ec7625---kobimufava.pdfIn PDF document text
    • https://cbolean.com/wp-content/plugins/super-forms/uploads/php/files/5oco76b1g7aa6pirme74qiusg5/matutoxiduguteg.pdfIn PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/tt7m5a4tg4gj8g8ever4apemo1/bumifenupor.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/86253821973.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/40732790096.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/160846f2e39ad7---feramujivirepofurudeteman.pdfIn PDF document text
    • https://migger.dk/userimages/file/98886925575.pdfIn PDF document text
    • http://thailaundry.com/imgUpload/files/xumuxipa.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088db8ab1f49---20042379437.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076d0b9b7e91---31945585726.pdfIn PDF document text
    • https://universal4shipping.net/userfiles/file/xibowe.pdfIn PDF document text
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/2356cca8fb2bb7fbfc19686b4d097366/penikozaxunazusemofogades.pdfIn PDF document text
    • https://riwg.in/userfiles/file/toginovedopun.pdfIn PDF document text
    • https://tavio.ru/files/file/gimumirifusokusaf.pdfIn PDF document text
    • https://crpm.ch/ck/ckfinder/userfiles/files/lexemadekoluzowujelob.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/72335952650.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/g9omepv5om79e6c18u0bq8voh5/13994863706.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c419b2ce193---bozepimodile.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_off00011008.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11008 11164 bytes
SHA-256: 69031eb630dfbc18cfc5104db666ef8faa50b593249624ef5ef9c6e19a242d5b
font_01_sfnt_off000129a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A9 19208 bytes
SHA-256: fa07b9698c8ec8720f02bafde68822f2f16cd9faa21313e2c14ab24aac775142
font_02_sfnt_off000159bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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