Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2ba5f54fe14bbe…

MALICIOUS

PDF

73.2 KB Created: 2021-09-06 03:33:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ed0cf258fc3478837b0aec1be7e6137b SHA-1: f4d78e8d6e4003452c81d8312e58953141c3ff8c SHA-256: 0b2ba5f54fe14bbe4b03234263bd1cfa94ff5707bbbc11daebd00dc685f49de4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, many of which are hosted on potentially disposable domains or compromised CMS uploads. The embedded URLs suggest an attempt to redirect users to malicious content, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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.
  • 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://ljlconst.com/admin/images/file/zonikofemegikik.pdf In PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/fauei14bshne9p452va4alkbo1/didipanatebajuzizopagaxav.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/2d75e37a2f77641ed8a444736960d473/7604058410.pdfIn PDF document text
    • http://laduses.nl/image/file/33346863158.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/retojimixawetuv.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/mululowinazadivipe.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/1d07553be8b5709dadd9dde2ca40c51f/16479049580.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a15ff3f7a5---25947178640.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160899d284d427---45940666362.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/susepekusoxezudi.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/33001963534.pdfIn PDF document text
    • https://clubsportedinburgh.org/userfiles/files/velelegaf.pdfIn PDF document text
    • http://worthingtonpark101.com/userimages/90630875226.pdfIn PDF document text
    • https://qnzar.com/files/43700489220.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/folebavizetito.pdfIn PDF document text
    • http://kag.fr/userfiles/file/jogururogedetifaxezemud.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/161103daf25304---48556142706.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/38399414.pdfIn PDF document text
    • http://interno-kazan.ru/upload/files/42412138333.pdfIn PDF document text
    • http://spreewaldatelier.de/img/editor/file/68119298622.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/tupuratagopo.pdfIn PDF document text
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/7d57f6be8598eb8eeb04a4acd2490362/sojugifofezov.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/jemiwixadesovi.pdfIn PDF document text
    • http://kirakuramen.com/uploads/files/neditevuletoz.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/q6t5965pd24h5jtl1anevgblki/43413485268.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/k5fdelj0tcg1rjq4tn3jumgned/75673006751.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mon+tout+premier+dictionnaire+larousse+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_off0000b755.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB755 10876 bytes
SHA-256: eaa4cd481cb04ee6398ea6a58a14caaa99dcf104c0cc8332f3d4159dfd760bfb
font_01_sfnt_off0000d06d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD06D 17828 bytes
SHA-256: 5a603cf7ea49e7a66b838d127ce9cc9b382641745ec4cb98f225710d2e52a932
font_02_sfnt_off0000fd47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD47 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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