Malicious PDF — malware analysis report

Static analysis result for SHA-256 014de036eb0cbeb5…

MALICIOUS

PDF

86.8 KB Created: 2021-09-01 10:55:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 802cfcde9ce6d1f54be7b238aaeae1e1 SHA-1: 432aa6031f849a2b842979b6507ad09aa6ed9bff SHA-256: 014de036eb0cbeb56bcaccbf23dba72843b7853ba8150cc21af90d8bcd1a0955
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress upload directories, indicating it's designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/slk44lufjs2tugframd67e1qbi/mowojariv.pdf In PDF document text
    • http://ipmarketing.net/userfiles/file/betusesugoninopebukalof.pdfIn PDF document text
    • https://btegypt.com/file/50205448925.pdfIn PDF document text
    • http://highgaincomposites.com/img/file/2021622225837.pdfIn PDF document text
    • https://broadcasthub.com/ci/userfiles/files/37943863732.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/kerijilevovavado.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/xadamulidedu.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/b3o2s44lokv0ujgum0b58jrm1v/nakuvofutatupawekaduwew.pdfIn PDF document text
    • http://cz-synergy.cz/data/file/2405229499.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/uhop3hsvd3hq67n0uvmv1q8lbf/dukunejizifivev.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160717820e02a1---mixepelokuso.pdfIn PDF document text
    • http://maremio.ru/admin/ckfinder/userfiles/files/sofomemefexi.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c412b6d25f2---28281080308.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/63244804306.pdfIn PDF document text
    • http://sfera-vlad.ru/img/file/38941289739.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16082cb626b520---gelade.pdfIn PDF document text
    • https://kurek-rowery.pl/user_pict/file/tevusenolufabekujijon.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0048f9c3ba---9807635290.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b8377b7ee07---20183584943.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/228aa95889f521c84c3c9883c7e97419/kovakewugizusudasovafezil.pdfIn PDF document text
    • http://caphegiabao.com/upload/fck/file/zujanobogefofufelosabasob.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/mujako.pdfIn PDF document text
    • http://rotang.net/userfiles/file/45085630381.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/46007209570.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/61977880123.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=rusting+of+almirah+is+which+changePDF 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_off0000ed9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED9B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000105ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105AD 17704 bytes
SHA-256: ec8579ff1f7d5d95d2fdc8c085d7e8d203c2daa7d9d15ea08d47f0c94613fd6f
font_02_sfnt_off00013369.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13369 11012 bytes
SHA-256: c335d17a50f113f44109165406430b98c2f0ed0c1a23f7dba92c6d39b6ee42f2