Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d2094dfff9fe217…

MALICIOUS

PDF

246.6 KB Created: 2021-06-29 03:42:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: cad1c4c8dca804e4579167bddda7787f SHA-1: 5a80e1b350c3b6aaf3225c50662eca25f86bb130 SHA-256: 6d2094dfff9fe21798236f13931ea146fce3a3f2d77bcf5dc0010354698cc546
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains links to compromised WordPress upload storage, suggesting it's part of a phishing or scam campaign designed to trick users into downloading further malicious content. The presence of SEO redirector links further supports this phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9817

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/8d1b8dbeb34595b5f45e328bca29b0ca/dafaxonejelibovikewatane.pdf In PDF document text
    • http://xn--szabowski-tub.pl/userfiles/file/wuxav.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ea3f2380b---503681254.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/d0d3474392ee78d75ff31a793d414a44/27572446006.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/jodibas.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092e61d5b4eb---muzewiwoxipibifepiwul.pdfIn PDF document text
    • https://otelnamore.com/wp-content/plugins/super-forms/uploads/php/files/869e5e413bc3cb1b67fe47b22125f9ad/fatupoxigirexamaxew.pdfIn PDF document text
    • https://www.proctoloji.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b350883e6---6799722905.pdfIn PDF document text
    • http://castrolmintabolt.hu/images/upload/file/kijokuj.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/df524a819c2694bc92d13087af22ec16/rojupasoxo.pdfIn PDF document text
    • https://freedomhypnosisnyc.com/wp-content/plugins/super-forms/uploads/php/files/ac13b63f625c535bcb65d2fe5491ce8a/19210901691.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/85047421828.pdfIn PDF document text
    • http://danielbushreunion.com/clients/41596/File/jafulomewomowavol.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/17518998752.pdfIn PDF document text
    • https://eminencesolutions.in/resources/userfiles/file/85894898705.pdfIn PDF document text
    • http://isgsrl.it/images/file/gukolomebasikufej.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/756f73fc7b249fcbe93d8cc51ab297b6/84383167301.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/78invbmc39gn0bnkd37kk7sqa7/gevimezibidibofolunoxoweb.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/24860139294.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608c98f0c12e0---wubezid.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/budisirutuxugosolizegafi.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/pobamuxesivuk.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/madareworebavazojujuw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=movies+to+watch+before+zack+snyder+justice+leaguePDF 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_off00036490.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36490 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00037ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37CA7 11536 bytes
SHA-256: 5d51cc4f831e255023e5979d33cbd376d09b30a7f2cf9bee75c14f84c4bb0cf3
font_02_sfnt_off000397dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x397DC 19680 bytes
SHA-256: 08f38471dd795fff769743033876d6a2d27b09760c76b3202bf7451270461f91