Malicious PDF — malware analysis report

Static analysis result for SHA-256 945172ee9525745e…

MALICIOUS

PDF

79.3 KB Created: 2021-09-03 16:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a01d3a20f1b8b297010adafa7d823c8f SHA-1: 3ca1c1ee5d70f63faa57e3e17f9e2cf219c54b7a SHA-256: 945172ee9525745e38e1b40ff31cc224ed0370eb4d0eec1bdf58ebc9a8162bcf
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to artificially boost search engine rankings or distribute malicious content through seemingly legitimate but compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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://hairtransplantmangalore.com/uploaded_files/userfiles/files/vavotalezogajuvesa.pdf In PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8001f53dff---noxukaxamusisanun.pdfIn PDF document text
    • http://rebizplus.com/userfiles/file/gezujulinalelu.pdfIn PDF document text
    • http://kardelendalgicpompa.com/uploadfiles/file/jopezotokom.pdfIn PDF document text
    • https://www.elektrobetrieb-scholz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d787003465---82621033018.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/temoraragapusi.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/u481nbtchecs6h2qjg9o5ksoio/bubasafimimozobuv.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/86137210394.pdfIn PDF document text
    • https://mzr-avocats.com/buddha/ckfinder/userfiles/files/73227576501.pdfIn PDF document text
    • http://findusafranchise.com/files/files/fijugebuderodidivopa.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/77ecaded8c548b5e0af93ad0c3ebab47/jozafufolem.pdfIn PDF document text
    • http://buyyoutubecomments.com/ci/userfiles/files/48802145653.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/kolarenabinarunotidudag.pdfIn PDF document text
    • https://semangkabiji.com/contents//files/4382263538.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a653fe5ae5a---67208530323.pdfIn PDF document text
    • https://motacademy.it/file/remeg.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b736cdcf55---nivokujasifasimeb.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/74833091556.pdfIn PDF document text
    • https://canevastoilestjean.com/upload/editor/file/wogusupufavuju.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/k9571abe7uhfmldkhiffvr1ui0/niwodorekejinejife.pdfIn PDF document text
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/3324155240104a968e6704f7ff17964c/bilevavuridujemoxixegijaz.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/aa0f6584e6b914c3f9f3bcd6a6e8b264/56731920482.pdfIn PDF document text
    • https://koetec.com/home/~ptow/public_html/ckfinder/userfiles/files/30298586011.pdfIn PDF document text
    • https://energooptima.hu/upload/File/kasorik.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160ec459223532---tesabaluruvewebuzafevuvil.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=design+qualification+format+pdfPDF 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_off0000d311.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD311 11212 bytes
SHA-256: 0677b5254769df52bfd8537688b0b690ee26d6b65c3a5e1559732d494a493689
font_01_sfnt_off0000eccd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DF 16604 bytes
SHA-256: cd0444f83ae1f0d25ef0134d203b97024d070528478ce90707e8b4669377ecd2

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