Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbc197204ab4ee3a…

MALICIOUS

PDF

82.7 KB Created: 2021-09-02 00:34:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1730ba6411d3c563958cb647e30f9b62 SHA-1: ee5775fb2ed0e71027be104b74856b52df96f254 SHA-256: cbc197204ab4ee3a417ce0c49a76629c8f3ba84fe9c00a09c3d2622eca1d1c08
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous links, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious destinations. No scripts were extracted, but the structure and URL patterns are consistent with phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=gets+and+getchar+in+c PDF link annotation
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16124edd7de649---rapusufozo.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a9689d1f923---68862812595.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d411085f1---14721465750.pdfIn PDF document text
    • http://intertravel.hu/_user/file/kebagegigosilisubumow.pdfIn PDF document text
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/famunagepivijugalulowa.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/44867831949.pdfIn PDF document text
    • https://agroadvanced.com/app/webroot/newsletters/editor/files/23665085889.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/56810365676.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97dd337fa2---wesozezekolakekowili.pdfIn PDF document text
    • http://fine-cottage.ru/userfiles/files/pebafepedoxepakuv.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/ruzadekewuvara.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16072c6cf2990e---rekukukisaxezufanujibanaf.pdfIn PDF document text
    • http://enricobarraco.com/files/xukuvegejejorajufidodaz.pdfIn PDF document text
    • http://foto-klub.dk/userfiles/file/31510476757.pdfIn PDF document text
    • http://thetsaban3watnuea.com/UserFiles/file/gukuvada.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608631b3873fe---64190406710.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072db6a910d9---dotowelawanotefizid.pdfIn PDF document text
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610395960a370---lozozofovofejasiveju.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160a29439979ab---fepasesekevadadanixem.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e946535ed2a---vozibagijexat.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/25702074914.pdfIn PDF document text
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/fdc60eba84c77ade2ce67339b9ac8271/ratosuwivejonemi.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c34126d8338---rujipufuji.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/xavakotolifupezodofibazux.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ffb74f1d526---40147630329.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_off0000debd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBD 17852 bytes
SHA-256: 4f85f0fb9c44d3fdb1d78ff32ec94870ad2ec4dd005c373aea29f132581cd5a8
font_01_sfnt_off00010d9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D9F 10524 bytes
SHA-256: 0fcb2662fcea21fd3f579213415b5f32d7f263e39b627b30a7221c34709823f2
font_02_sfnt_off0001254f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1254F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.