Malicious PDF — malware analysis report

Static analysis result for SHA-256 d772f907a8fd401f…

MALICIOUS

PDF

83.4 KB Created: 2021-09-07 19:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 1ad700556ef19a0132a66ce61980fac7 SHA-1: d7961f5594100f223177788ca059e69b306ca271 SHA-256: d772f907a8fd401f6113a86e551b8b0fb10c0b4922cf5a828202f8a2bd4735a1
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of multiple suspicious URLs points to a watering hole or phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://parkhigh65.com/clients/4970/File/66640216194.pdf In PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1610890cb94749---mazisewitomolasadiruz.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/e61d1fd5ddb6843a96072c77047effb2/tururewinigukobibar.pdfIn PDF document text
    • https://bettyloupaints.com/userfiles/files/51321677467.pdfIn PDF document text
    • http://bona-agra.pl/Upload/file/mifanefekupagotaz.pdfIn PDF document text
    • https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/13bca2b9fd06e3e254d611dc7fbcd0b0/pematiposumatajulaxanox.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/12884402309.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/xonugekijul.pdfPDF link annotation
    • http://medica-brno.com/files/litot.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c3e57e176f---zuvawiret.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/47355360092.pdfIn PDF document text
    • https://x-software.cz/data/file/34863952390.pdfIn PDF document text
    • http://labotinnghia.com/img/files/revubaregarodakakat.pdfIn PDF document text
    • https://bandai-k.com/userfiles/file/dezukivopefefenebuxururev.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/7f53fb0aeef0c1956fee6928a2e57936/57287729119.pdfIn PDF document text
    • http://di-tech.kr/fckeditor/userfiles/file/12770924691.pdfIn PDF document text
    • http://malverne69.com/clients/a/a7/a743c233813d1a1dbf5c38c484d85cdc/File/13860620918.pdfIn PDF document text
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a2970b29550---31656526761.pdfIn PDF document text
    • http://hillsclinic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/zoxosiredumatu.pdfIn PDF document text
    • http://headrepublic.pl/images/files/dalebikemivikudesi.pdfIn PDF document text
    • https://ventadeterrenosagricolas.com/userfiles/file/fisimimozuxibewusosojo.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/5863f8d375b2dde99de7d1067eb3b1e9/29426999526.pdfIn PDF document text
    • http://ural-kip.ru/admin/ckfinder/userfiles/files/20492649676.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/gibidndsujldhjep0h187nvft7/bopigasisabefelewupes.pdfIn PDF document text
    • http://lirealestatelitigator.com/wp-content/plugins/super-forms/uploads/php/files/31bbda66bc831a1d409e74ff9ae318c1/23634675315.pdfIn PDF document text
    • https://aicpwdosaeast.com/ckfinder/userfiles/files/serapuzabugaziregaxapux.pdfIn PDF document text
    • http://farashimirooz.com/files/bubuxujefigizorulevilotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=wiley+trading+guide+volume+ii+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_off0000dc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC32 19196 bytes
SHA-256: eabe0d9629e7d58be41f4e88f1ff15517c507edd320cbc8dfdb908a574273d19
font_01_sfnt_off00010e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126AD 10944 bytes
SHA-256: 22ae1e87e1f3e9c5b603f8deb3e616c4941a3931c2ef56be4fa39960aebb0b74