Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2fdc53e1c238309…

MALICIOUS

PDF

72.5 KB Created: 2021-09-07 15:57:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: fa0b081a574605f921163d6425685c6d SHA-1: efd0d4e09923d2a2e6b8a6f94a6caccbce49011b SHA-256: f2fdc53e1c2383095f609d6fa08c8ea4b708b66c10046f575d7581baf1a11f0d
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple URLs, several of which are hosted on compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body is heavily obfuscated and does not provide clear textual content, but the presence of numerous external links and the compromised hosting suggest a malicious lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ooobelkom.ru/ckfinder/userfiles/files/82652141014.pdf In PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/bok7uap10orr7ncqfusp0cg3m7/bejiwowu.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/1a3557df7d5bf52873de6df3798bd390/xaziwavifumirokusix.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/16102c18a0203f---kusugasali.pdfIn PDF document text
    • https://nevisnews.com/userfiles/furoxewakafemera.pdfIn PDF document text
    • http://afgventuregroup.com/cfiles/file/18075048634.pdfIn PDF document text
    • https://derfo.info/resimler/files/85639373939.pdfIn PDF document text
    • http://earthtalismanjewelry.com/clients/b/b2/b27d4d76c51cd35ccef873a204118430/File/19616056240.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/24565786909.pdfIn PDF document text
    • http://machinegroup.ru/img/outer/files/ferasodobumuwefi.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093c8da8fe4c---zideluvinejos.pdfIn PDF document text
    • http://dui-antidote.com/images/userfiles/file/91247032302.pdfIn PDF document text
    • http://akcompany.vn/uploads/userfiles/file/xivafobulunu.pdfIn PDF document text
    • http://skylineidaho69.com/clients/c/c7/c7306e0a9cc1d421caefa9c307ca601f/File/foxojise.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/99797793023.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a696c596af8---92057999736.pdfIn PDF document text
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085a85933e60---lulukivasuvegafuzofewu.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079fbad3c24b---jekiwegubirete.pdfIn PDF document text
    • https://greenfuturevietnam.com/Upload/files/89001663685.pdfIn PDF document text
    • http://bassbasement.org/userfiles/file/84445983180.pdfIn PDF document text
    • http://casaalu.com/luutru/files/fulikexube.pdfIn PDF document text
    • http://goodwill.as/userfiles/file/ropovole.pdfIn PDF document text
    • http://worshipedia.mobi/sites/default/files/file/jopatemiluzu.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/polikuwojiwajimigin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=ipega+pg+9078+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_off0000b782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB782 16568 bytes
SHA-256: 6fe24e040d960477ac53445ec6eb7338a3bcfca703abeb2ee5c954b71c6a8012
font_01_sfnt_off0000e22e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE22E 10616 bytes
SHA-256: e74c716674a41d090c3bd60d5255ca628ede3725292b006b03e6f40b258afe21
font_02_sfnt_off0000fa74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA74 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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