Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3af00808c80341c…

MALICIOUS

PDF

108.3 KB Created: 2021-08-12 14:04:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bb15f76284f9c796641a7fc13ae3d7e4 SHA-1: 44edeaba0d05d7172a5d53843010556513b22278 SHA-256: c3af00808c80341c2642d4d05ab53bb55a5b9f8cd72600965d23e32b73632447
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1553.005 Security Software Installation

The file is a PDF document flagged by ClamAV as a phishing trojan. It contains numerous links to external sites, many hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or redirection mechanism. Crucially, a heuristic indicates the document instructs the user to disable security software, a strong indicator of malicious intent to bypass defenses and likely download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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://iscyber.com/userfiles/files/46391558926.pdf In PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/7sr4j34gbdk86tb6pondspdvrb/98543610679.pdfIn PDF document text
    • https://protradingindia.net/userfiles/file/vagiwidem.pdfIn PDF document text
    • http://www.ppk-kp3k.kkp.go.id/ver2/extra/ckfinder/core/connector/php/media/ckfinder/files/sumivalojoxubex.pdfIn PDF document text
    • https://loctra.net/userfiles/file/joderugajalibogexisomatim.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/26fts9eg1v46bmdqrc6tavkaht/16444608432.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/birumeza.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ed59412ab---joguwolirifuzevobonux.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2r1aoif36mq85ktloml919nih2/sepol.pdfIn PDF document text
    • http://solee.cn/ckfinder/userfiles/files/30271730263.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///kutovebip.pdfIn PDF document text
    • http://kingalbertltd.com/uploadedfiles/file/zexivit.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/71380549587.pdfIn PDF document text
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a11b402c89d---sesewowavijepep.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160910e7213d60---bodajifesedemugopi.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/dalev.pdfIn PDF document text
    • http://bike-aholic.com/UserFiles/file/jokewigigusofibodo.pdfIn PDF document text
    • https://amesmedicalservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608541b23d77f---guzirezaxaxeg.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/18466364182.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/6b9d9ca7e16ec1d45bef87f51e835324/3370412775.pdfIn PDF document text
    • http://rw-hse-businessconsulting.de/userfiles/file/31006319446.pdfIn PDF document text
    • http://jingchengs.com/jingchengs/ckfinder/files/20210806165928.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/30baa21bc799239c3204844b16c36e63/46070718989.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=sony+str-k502p+manualPDF 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_off0001400c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1400C 10980 bytes
SHA-256: 03afd7b27fd5971ceacfaf3ff8db4bf94d1243b9a60f7915cee4f1b3d6b8d495
font_01_sfnt_off000159ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159AC 18532 bytes
SHA-256: b988de4f5ad786fec909df391e320177be333abbb0d5dd825cd51b934301e8ad
font_02_sfnt_off00018aab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18AAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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