Malicious PDF — malware analysis report

Static analysis result for SHA-256 095bd9a0ceab2d68…

MALICIOUS

PDF

132.6 KB Created: 2021-07-14 03:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bc27030257279f55bc2d0c7ec2fa2318 SHA-1: cd2d0a2a4541640f9d6720d127000c92e0094f7e SHA-256: 095bd9a0ceab2d688e81ee636270e6bb05325277f8f3693939bc5ab297b38b5a
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting it's designed to lure users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://chcial.ru/uplcv?utm_term=african+religion+and+philosophy+pdf PDF link annotation
    • https://basisnomor.com/contents//files/45490725241.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3e4729baf1---88816173350.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/4555a69674c70fc6f47cd450bc241b20/loxulefijas.pdfIn PDF document text
    • http://kapli74.ru/upload_picture/morutaf.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081ca91660d2---lowizejipezikuzikeburajuf.pdfIn PDF document text
    • http://doo-san.com/userfiles/file/20210521114627.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f093d251a7---145782370.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/99115338544.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/vujenuferejejukuwomobi.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/039ccb5e0099ff1bc2452836fadfa4eb/17428420794.pdfIn PDF document text
    • https://aronabritcan.com/userfiles/file/zujabawozazunejideb.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/8d5b805686521e65fcbde06caab98cf5/pexodimuwe.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc85ad30a5---9252025871.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/d58098a02dcd45b1941efbbd61e439ac/29413637524.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/ptkf0r4oj14t2a46kqugf0nbbo/kokepufogojuja.pdfIn PDF document text
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160a02e653bb7e---gunananizatajowa.pdfIn PDF document text
    • http://goldenbaycruisesagent.com/userfiles/file/79563307702.pdfIn PDF document text
    • http://merwepizza.com/upload/file/41149003807.pdfIn PDF document text
    • http://broadviewlibrary.org/uploaded_bvlib/file/37024804394.pdfIn PDF document text
    • https://colakcivi.com/userfiles/file/37132874093.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16081779684cf6---kinibigolobezovozo.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/7se1m1e0j7jep9jgu92n66ggs5/lujapamezexivex.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096c22255b5f---91374204729.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c967637f96---dezizilawotidab.pdfIn PDF document text
    • http://ligneus.hu/upload/file/dotonuwawerapomekewagerok.pdfIn PDF document text
    • 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_off0001a642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A642 10896 bytes
SHA-256: 298766526bd887cada580edd320db11917690a20d886c7fc34900b7183439697
font_01_sfnt_off0001bf2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF2C 16896 bytes
SHA-256: cecb1e838ef787ec3634eee827c842edeb3997a1533664db397ab72bbf4a326b
font_02_sfnt_off0001eaeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EAEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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