Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5c4cabb8262b59f…

MALICIOUS

PDF

83.6 KB Created: 2021-09-01 10:22:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 27f9871b1c4550dc08ab740acd91455e SHA-1: 22a1eb91c1a0822da42365a3872d31306da7a122 SHA-256: c5c4cabb8262b59ffddf286f33138538f8a1053bc429109de27256dbd9a6c398
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and ClamAV as malicious, specifically as a phishing or trojan distribution vehicle. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload storage and other disposable hosting sites. The primary purpose appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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 https://coretry.ru/uplcv?utm_term=zoo+personality+quizzes PDF link annotation
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c34e73f970---sasavab.pdfIn PDF document text
    • http://depcip.com/app/views/panel/ckfinder/userfiles/files/88587975206.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083d344873e1---lerixiwezomipiso.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2d2f8560df---66314652522.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1608f808f26666---44106327742.pdfIn PDF document text
    • http://tasarimak.com/ckfinder/userfiles/files/gevorutize.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/kemenizi.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cc0b2809a5---xasosawudaxaxuxanazi.pdfIn PDF document text
    • https://tw-itemaos.com/ckfinder/userfiles/files/47445045502.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610460d6d0f87---55612877739.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/riwiwepukopapi.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/vifer.pdfIn PDF document text
    • http://rbtyutj01.com/userfiles/files/25296736036.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/dekejugezumigubogemeb.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/boej38dd11so19fjnlvgsq3gp5/sotobewefoteralarodisu.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610149eec2897---fazufexudibevasasavav.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/2d9051c73cb4a4921bdc01591a1f5b45/63064393197.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/0c23966269acc82bfaedce9a3006a8b4/50325302089.pdfIn PDF document text
    • https://kenadong.com/contents//files/samisijavukeneradito.pdfIn PDF document text
    • http://architettosbaffo.com/userfiles/files/6323311011.pdfIn PDF document text
    • https://grouptm2.com/contents//files/57045833407.pdfIn PDF document text
    • http://princeverma.in/uploads/files/bitejuxesoti.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7315ecc5b76fc7b283db3155316b88d7/10401377038.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_off0000e326.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE326 17448 bytes
SHA-256: 56d355d21a13813677c10fba32ff7133e207e70cba37c03f41c4d9c160172c41
font_01_sfnt_off00010f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F48 10628 bytes
SHA-256: 723d0416ae6da5db85eb3f417a7c0bebf26c05838345de1bfb6702f50816bd31
font_02_sfnt_off000127c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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