Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9e14cee8343c469…

MALICIOUS

PDF

77.5 KB Created: 2021-09-07 14:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: e216f52abf2de36fb5bf2c25d9dc6d7a SHA-1: 9d20a2ab4a3d8fa0af4f147227d2b96a870e0aaf SHA-256: a9e14cee8343c4695aafc2f29307069f4770398b004c6624979b0f7104ebc25b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. These links are likely intended to lure users to phishing pages or download further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://suemsas.com/wp-content/plugins/super-forms/uploads/php/files/kr9p6r657n6kk4v867hgltn283/fipofaguzikanek.pdf In PDF document text
    • http://rld-carbon.ru/file/59189395344.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba309c4c69c---jamogop.pdfIn PDF document text
    • http://snp-ent.com/files/fckeditor/file/837068448612f03c238214.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/cqf2vmpv5s139aa0bii9vcft6f/konimabonejibug.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/ad9be045833a8c6ef1d29c4e8671bd26/rijelaramad.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/zojonufegevaxofo.pdfIn PDF document text
    • http://easy2ticket.com/upload/files/72328705267.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/33060066787.pdfIn PDF document text
    • https://kovtec.pl/eurostyl/photos/file/xusebajekusutano.pdfIn PDF document text
    • http://cpbnatation.fr/fckeditor/userfiles/file/47937454862.pdfIn PDF document text
    • https://aeap.com.br/ckfinder/userfiles/files/wuwina.pdfIn PDF document text
    • https://ikansambel.com/contents//files/jiridalaladodoz.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c858d13713c---kasodibinemifam.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/51fcee68fb18bf9dcdcfe2a204334b87/27634614112.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16071e7d1e05d0---lewazidavivodunikup.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b21967b4b59---vizoguwe.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160892c908f8ff---xexepuwilukiwirom.pdfIn PDF document text
    • http://fapannimario.it/userfiles/files/31120298306.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/8n38up4jf2b8gkoce6rfu8i0il/51868000945.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7d3ee3836ae5bf090a3e777c802f1f01/dajigikufeka.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/vuvozikexolapo.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609056debbe14---67767397310.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081e0bc6dc10---nimalolimo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=le+nouveau+taxi+2+livre+de+professeur+pdfPDF 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_off0000c3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3B3 10836 bytes
SHA-256: 1684467bfe1d8134298d780b3515685b99e0c9188fa0b8a7b73951803b294762
font_01_sfnt_off0000dce7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCE7 19976 bytes
SHA-256: 6d645c2deec92f7a3ca64c2b685a52063a25c1598382655fb07e8110329595e3
font_02_sfnt_off00010ff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1