Malicious PDF — malware analysis report

Static analysis result for SHA-256 68d70afcb05d2e32…

MALICIOUS

PDF

85.3 KB Created: 2021-08-19 14:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1bf0e171a1ecbe21c46f10c40ec96def SHA-1: d6dd43e6a0ef1133eca7b041c57eabf11f2b4327 SHA-256: 68d70afcb05d2e329cd6d5f88c4193ce65531aacbbc83decc41e42ab68d3f193
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly suggest malicious intent, consistent with a phishing or trojan delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9919

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 http://ceramicaartisticamarsalese.it/userfiles/files/68139978051.pdf In PDF document text
    • http://mamolenasnc.it/userfiles/files/nujawotitajuraxituruk.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd98000904d---73284883712.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608138cbd5b40---72619231159.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd11264a14---92623768285.pdfIn PDF document text
    • https://kalyna.ua/sites/default/files/userfiles/file/noteje.pdfIn PDF document text
    • http://projectbudapest.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16079dae5a8258---mokepojekulukijag.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/4702e49bb8dadf38802015869b8b342e/tisekuribemasok.pdfIn PDF document text
    • http://jgbt.us/pds/userfiles/files/52441197292.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/wiruremazikok.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2ba9eef85c---xamogevupuvup.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/26204409701.pdfIn PDF document text
    • http://prospekt-rostov.ru/ckfinder/userfiles/files/32349112013.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090e792d9452---lonugawat.pdfIn PDF document text
    • https://ozmutludokum.com/userfiles/file/fipadukeludej.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/2cbe366a892b97365b337979b54bc72d/zelujosekuwe.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/4785df34b5df2324baaf6a02681e706d/diseretakododubuxep.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97346a4117---48397031182.pdfIn PDF document text
    • http://mosjob.ru/images/file/wamiwawoxizotoga.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/19408222264.pdfIn PDF document text
    • https://lescourailleurs.com/upload/editor/file/dulanil.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075eab34511f---18498712607.pdfIn PDF document text
    • http://grabnerestriche.at/digilogunu.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/lq36tkfj3lu6iu3gsts6nlss03/82388775167.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/8jdem90rphbah1qepegei4if5q/vipegixubusijewoseju.pdfIn PDF document text
    • https://tedvandergulik.nl/userimages/file/mexuwatofow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=cyberpunk+2020+hardware+pdf+itaPDF 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_off0000e53e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE53E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD50 18276 bytes
SHA-256: edbb438cb98b198dcc06524bb86e0e46b56a2c9ac43b6414920050876f60caf2
font_02_sfnt_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 11068 bytes
SHA-256: 98ad0fc4d57975c41a99c3bcd69ae0388a4fb15fdcdf38643145406e526c1d9c