Malicious PDF — malware analysis report

Static analysis result for SHA-256 476176deaa1c9fa7…

MALICIOUS

PDF

92.2 KB Created: 2021-08-15 15:09:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 58705f4538802718db453c584047d839 SHA-1: 36f29dea398069be5d2656a005e80d5dbaf67499 SHA-256: 476176deaa1c9fa74ed224b9d70a8242663c632fd7b6c9500e88443d61d1104f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple PDF-specific heuristics related to URI and link farms supports this conclusion.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://medvor.ru/uplcv?utm_term=hustlers+movie+release+date+on+netflix PDF link annotation
    • https://gemwares.com/userfiles/file/nitejekelisuxigokagulutof.pdfIn PDF document text
    • http://congtyvima.com/images/Download/legomo.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/91131447012b155b5bf42ce95f857cf8/40300970670.pdfIn PDF document text
    • http://bean2beenefamilytree.com/clients/60578/File/zuvifapofatiwutaveveru.pdfIn PDF document text
    • https://all-stage-meditation.tw/uploads/files/60ceab7e1aa03.pdfIn PDF document text
    • http://longchimvac.net/app/webroot/uploads/files/64629628171.pdfIn PDF document text
    • https://anmimar.com/royal/userfiles/file/jupekojazox.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9dd33abb2---paliraxedun.pdfIn PDF document text
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed3a4uo3bkum2fkqrgq5253mvr/33512600160.pdfIn PDF document text
    • https://dm288.com/slicice/file/josalepadaxefaxepuzo.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/1luvks3v44148b0n5q0341u4f4/7394215063.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-7-10/20210710144950633452.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f58c3efc7---kawipebuxovimafedu.pdfIn PDF document text
    • http://notarbrazda.cz/userfiles/file/kezenikoratibepegeraxo.pdfIn PDF document text
    • http://www.sport-konyv.hu/userfiles/file/posokajerebabofoxokavatu.pdfIn PDF document text
    • http://fipjp.com/userfiles/file/98301766729.pdfIn PDF document text
    • https://dafelia.com/files/13388596316.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/kuravina.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/71478933794.pdfIn PDF document text
    • http://1night2daytour.com/ckupload/files/kovurozajibagepewiluzalis.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a159f06af1f---mosoxug.pdfIn PDF document text
    • http://saamfactory.com/wp-content/plugins/super-forms/uploads/php/files/1d8beeefd493f54d8482514290931e00/lafapiresejuvabuzoveb.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001013c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1013C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011953.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11953 10776 bytes
SHA-256: bbdb53db43e98d625fdb66cc66b871365dc0c53db6e5c57f9d44a67e76e08ebe
font_02_sfnt_off0001321d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1321D 17672 bytes
SHA-256: e8309987e400573c86537ca51db9d38aa9fc40c5a41059a58b3c406c7d960d23

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