Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7b1ee21c621e6a…

MALICIOUS

PDF

86.9 KB Created: 2021-07-27 15:42:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 972042cd054f461e51282655dd3ce139 SHA-1: b8baca7d9056fef82051f27edca0774b5030bb46 SHA-256: ec7b1ee21c621e6aa917ea730b176a3857478ff2b0f00c8b14e687fa89d131eb
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs likely lead to further malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://lapawan15.com/shop/fck_file/file/jekowul.pdf In PDF document text
    • http://serramentisiciliano.it/userfiles/files/debaverusejebulamamabaxej.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/cec89809dfaa1ae23b8c332d5cd400b0/9212706649.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16078405af0412---44189780228.pdfIn PDF document text
    • http://alhouti.com/userfiles/file/20745126753.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/e1029400a0eb9ffb32369fe6312adffc/wasotukiwugo.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160df6d82bd7d8---jubivitagidupesaxutop.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/xelaropivagonolilaseta.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/d50de169abaf14b321d245497db73621/jajejafuzurisa.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/3gbf0lnl7b2mkgttkdi1aaleu2/lumogefonapedekibuxug.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/300852414772.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a36f09aecc4---51242058518.pdfIn PDF document text
    • http://www.sec-ollivier-associes.fr/www/upload/file/joluwo.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/lbf3b6rf68ob29d4hvo2o62bp1/xenusabibumurokuxupew.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name//files/17847390663.pdfIn PDF document text
    • https://charqueadaboavista.com.br/wp-content/plugins/super-forms/uploads/php/files/6ffe20ec552a13917305088111118c74/tememupenotop.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/504d67b7cc1abf26652d08d3154dfe2f/kanujojulusaxepo.pdfIn PDF document text
    • http://ei-windykacja.pl/upload/file/gufogezulijevupepapof.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/49465572014.pdfIn PDF document text
    • http://nessium.fr/userfiles/file/gegijijokaxodalelubup.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/43e3a5939c1e90dc820661e35e93fa7c/lafanadikebevezimawetole.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c82a1c2a9e---zatigejitotesover.pdfIn PDF document text
    • http://studiolorenzino.eu/userfiles/files/50029132896.pdfIn PDF document text
    • https://erinmillssmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/6fkb51mf8p9dbkqskt0g6falc0/47943361297.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=www.kambikuttan.net+pdf+filesPDF 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_off0000ef74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF74 10916 bytes
SHA-256: f278480f0695cf5352738a99ac141b2b69c3fe3b4abde909f12187820c42efd9
font_01_sfnt_off00010886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10886 17000 bytes
SHA-256: 5bdd8141c98ca4a5f6ab601fa26fe02ab74ed61d32dc65e26c363301ed0a9af4
font_02_sfnt_off0001350b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1350B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1