Malicious PDF — malware analysis report

Static analysis result for SHA-256 9acb04775a1e9f54…

MALICIOUS

PDF

89.0 KB Created: 2021-08-06 17:55:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c104982265055d85a710c18fb23c72d6 SHA-1: 6849eaf9e56baea165e92d1375db181cd2824d48 SHA-256: 9acb04775a1e9f5469a60c2483fdf6bf73737130a10bc891998fb750d9cb6462
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://queure.ru/uplcv?utm_term=fantastic+beasts+and+where+to+find+them+3+ezra+miller PDF link annotation
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/8555bc71fb341defcde51535ec56f430/zanutinisibevudefusuboxas.pdfIn PDF document text
    • https://drivingschoolofnorthtexas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6245642a3e---mivaluzud.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16078b99bba96d---pamixakilupojanafikugo.pdfIn PDF document text
    • http://emailreceptionist.net/userfiles/file/63414925338.pdfIn PDF document text
    • https://metnar.pl/web/uploads/files/mepokosuzuleviwifuje.pdfIn PDF document text
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/30f4a85b2acaeba74505fd55b5f887d3/zefopemapize.pdfIn PDF document text
    • http://khiconghoixuancong.com/Khicong/admin/userfiles/file/9845581557.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/bipezinowadivudosine.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/utbjmohd3dn3jmc0lnkjk84950/35724542812.pdfIn PDF document text
    • http://capitaloffice.pl/fotki/file/24843779354.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9de6170ff---62580956631.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/50230561852.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/nenos5eg7ggi6pri5juptenm8p/90696413050.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a53d5fd19eb---semeguwu.pdfIn PDF document text
    • http://penzionklara.cz/userfiles/file/43389465484.pdfIn PDF document text
    • http://gemculture.com/userfiles/file/kazovimoguwepebalufov.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160ed1e68535bf---bevosimolinanoboda.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b99d6dd1a42---65849936671.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/b9eaa8f1484f1e4cda9785082ee41540/muxexekiwesuminegabo.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a6ed7a6f40---zegenemukonewedafilat.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/59157948787.pdfIn PDF document text
    • http://liveisagenix.com/ckfinder/userfiles/files/43948725932.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_off0000f7c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 11176 bytes
SHA-256: d6e792e4e865bd7052b08becc45be40f3c29a7fbd62e6aeeb100780fad8e455e
font_01_sfnt_off000111db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DB 16884 bytes
SHA-256: dbbf407a996e94afe14d8b084ba57e319ef24589fce9ab74fcd14602ce012907
font_02_sfnt_off00013dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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