Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bda57ac93c345dc…

MALICIOUS

PDF

86.2 KB Created: 2021-06-30 22:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b3fa11d51ccbbe66ec1ff0a9331be782 SHA-1: e7d31f6fb03a1c23dfaf5d5a8fe190d9620004fe SHA-256: 7bda57ac93c345dc4ddbb8f499a0414342ab1b829e341ef2d7a7a026af015b97
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically indicating phishing and Trojan activity. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the overall structure point towards an attempt to trick users into visiting these sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://garglob.ru/uplcv?utm_term=pdf+files+for+dummies PDF link annotation
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/7c9344b6b3112bf08c3981e3ccbc84e7/lazowetowigepu.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/tilajexubaxotepupur.pdfIn PDF document text
    • http://nordicaluminium.ru/userfiles/file/85312332417.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/kofawas.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/79252627740.pdfIn PDF document text
    • http://ghhs1968.com/clients/5/57/5762190d0a265df614d1f295a7060a42/File/11021074263.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c96da2705b6---goloduwiwigagezuzokun.pdfIn PDF document text
    • https://cvsc.co/userfiles/file/20017920628.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608070aa1aabb---bujuz.pdfIn PDF document text
    • https://creteotels.gr/FCKeditor/userimages/file/zakif.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/azazewatamowukiposiresop.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/fa80021ac70178d2dbe143cb9a4bff56/42855220272.pdfIn PDF document text
    • https://ka-base.no/images_content/file/jusozokuparumitamalir.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5924a6039---losemex.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b510ec26b97---texutepa.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/62a03f09a96774ef3679da7439592704/wuvadupol.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160832433c85fe---pefusodujefixadir.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/fesetevetegaxewejexet.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a463a46d7c2---69547404280.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/fdebe12909f27bebca9814ea246dc86c/lumitofijudunugupupexunu.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/3d55d517d21921905cb5836d46ba7fa9/35581244836.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/67539984781.pdfIn PDF document text
    • http://nousgarage.com/userfiles/file/12923470130.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/lfm85g3fhfsbu4ks9d7creoptf/dapokex.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210609_011723.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/felumewo.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_off0000ef9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9E 17108 bytes
SHA-256: fa7ee669a3ef716a086bd6b91fd82c76992cb3cc34af09a7ff0fc6cc387b44d7
font_01_sfnt_off00011c82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C82 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013499.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13499 10252 bytes
SHA-256: ad06f2c8d8a6b24a37329f9196360fea5d40bf27076439f862f166554ffde57a

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