Malicious PDF — malware analysis report

Static analysis result for SHA-256 92076f5803ef26c1…

MALICIOUS

PDF

72.3 KB Created: 2021-09-04 01:08:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6d9b1eed02d80a01387b637a6e252020 SHA-1: 930f9c59ca5b72a120beba16498fc70dbec2a86f SHA-256: 92076f5803ef26c1b5624b4aefc038112d940b6136585177a35f2b6b94b1caca
156 Risk Score

Malware Insights

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

The PDF contains a link farm with multiple external URLs, some pointing to compromised WordPress upload directories, indicating a potential phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were extracted, the structure and URL distribution are indicative of a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://buyafranchise.org/files/files/15654883873.pdf In PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b17c9955f842e228da52b809292b0d4f/jolufagejok.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/009a3d8bdfabb82c427f4189c40c35ba/tijeluxezolofotitefezujej.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/40721895168.pdfIn PDF document text
    • http://hodinovysoused.cz/upload/file/donexekonekariga.pdfIn PDF document text
    • http://ventilatoryzlin.cz/images/file/januforiwo.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/rexabefabonesotum.pdfIn PDF document text
    • http://malbreil.com/userfiles/file/duzupigijinoxur.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608073b9e9abe---16072125531.pdfIn PDF document text
    • https://crc.creativechange.net/ckfinder/userfiles/files/55020540171.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/79115865035.pdfIn PDF document text
    • http://linker-apps.com/files/migixaluviwiloworowerigix.pdfIn PDF document text
    • http://gzky.cn/dubeite/ckfinder/userfiles/files/20210613_044413.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/16569499949.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/xuratijapalafaduliduwa.pdfIn PDF document text
    • https://history.tlshaa.org.tw/ckfinder/userfiles/files/buratifuzasew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=dragonfly+x2+tattoo+machine+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_off0000b7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B3 11052 bytes
SHA-256: 114380333b935e977ef9eee896d6dbab03e594f763e9b74f6d865303a3ed970f
font_01_sfnt_off0000d156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD156 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE968 16548 bytes
SHA-256: ce69b0e1a520f896c05d6c719e67b7a1ed737394dda5cf18b527b9b2cc323d9d

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