Malicious PDF — malware analysis report

Static analysis result for SHA-256 0717cadaad671550…

MALICIOUS

PDF

81.5 KB Created: 2021-08-12 10:51:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 4bae63243355238c44face3482fcb5ad SHA-1: 1d3853e0c33fd9c2352208f2bff49ce56f91f1ac SHA-256: 0717cadaad671550765cae7a35a529410ff45b35efad29423321ab1e542f149e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. Additionally, it features a link farm pointing to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious sites or download further payloads. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160843e62035b1---bagaranovesitirumuj.pdf In PDF document text
    • http://thepnguyentran.vn/media/ftp/file/7595824932.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c9f347b421970b225cb2db16bde1d0e2/kejojetu.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/42348757991.pdfIn PDF document text
    • http://asustainable.com/global/file/4008489966.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/senuxolupidew.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/d6df7e34d03ec8994ae16a8aa3a68933/86972133935.pdfIn PDF document text
    • https://wineart.online/userfiles/file/59753716772.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/sadisusevojugusilub.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a581ded3b7---97523091828.pdfIn PDF document text
    • http://womenwhorockarkansas.com/clients/4/4c/4cfcdabbb7b8ad81bafe9a4295858145/File/55990910134.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b65d328217---14753447666.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607823e47c60c---69465202126.pdfIn PDF document text
    • http://chrisdepanneservices.fr/Sites/cds/files/97431053154.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adb9bfc86d1---48611006920.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722f307872b---23019134394.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/85041891022.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7622fa7683---mofuzudonumaparivaveg.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/aq6mvb2231p4dk80tj7628nu99/lulejojan.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/93941417619.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161100d7caa47f---dobutuwutibag.pdfIn PDF document text
    • http://alrabbancapital.com/file/files/17783386403.pdfIn PDF document text
    • https://irrisyst.eu/files/file/14293466207.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f2a4345765---bajowuzakixadafexudalel.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73ad866bf7---dekiwukojakagelabekonujo.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210602191552.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=el+libro+negro+de+dross+pdf+gratisPDF 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_off0000d641.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD641 10796 bytes
SHA-256: f524bae94dc846f24311f43575c71811d2fcd5caf3275117d04e36eb21896044
font_01_sfnt_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 18492 bytes
SHA-256: 6e1473bf7e4696747edf42873ca561780232df66a2428fc9e3692bab8627db66
font_02_sfnt_off00011e2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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