Malicious PDF — malware analysis report

Static analysis result for SHA-256 122e24d324402a03…

MALICIOUS

PDF

89.8 KB Created: 2021-09-06 09:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 77069e9c4521902c821bbe77039d5229 SHA-1: 9e2372d07c1d2125e63af4b53f76ba8006a8ff9c SHA-256: 122e24d324402a0380fc7b843195b97035768552cb11ff293413a4a5a3e686ab
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, with heuristics indicating it functions as a link farm. Multiple URLs point to compromised CMS upload directories, suggesting a distribution point for malicious content. The PDF structure and embedded links are consistent with phishing lures or attempts to redirect users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://www.mueblesgamez.com/ckfinder/userfiles/files/30231294901.pdf In PDF document text
    • https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/e38ca013d2e22d00b613836b310a359c/67956222853.pdfIn PDF document text
    • http://az4group.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160794bde6799a---devivanovigi.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/tijigoditeletozos.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/bibativexibapikesuw.pdfIn PDF document text
    • http://thechitay.com/uploads/userfiles/file/76258954939.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16098b74e60b63---6018524874.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c1049024a6d---39330421662.pdfIn PDF document text
    • http://www.theagentpipeline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f3e8bb3bd---pejerotonigixig.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/92412125433.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/bc5318240804a2ad236831dc6885e3be/fusaxijineg.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/f832935780394bc4dd085732c617f503/dotemaxipijivikisoje.pdfIn PDF document text
    • http://websurin.net/UserFiles/File/13650341782.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/0526cc9767c6b04cb30483ae25c4481c/wivifokusapefezob.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/zuratoxixijopusoboz.pdfIn PDF document text
    • http://alwaditrading.com/userfiles/files/9742857410.pdfIn PDF document text
    • http://sport-way.ru/img/file/zagubizitaw.pdfIn PDF document text
    • http://noavarservice.com/ckfinder/userfiles/files/kovexaja.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160797233ab0fc---85857887849.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/c52a149b977ad9f8802f17073701a5a8/92310466279.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/l09o9sl39sldlshtg8oj1ltj92/31101285962.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=biblia+vulgata+en+espa%C3%B1ol+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_off0000f055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF055 21644 bytes
SHA-256: c809b69a1ac2d402a3708c3bb1a18c63c7f0a0668861d3c7e3737cf93651d30a
font_01_sfnt_off00012651.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12651 11136 bytes
SHA-256: aead5239677d53709e497b14b62c68c7ee1c52bca36a1b12e53dac61c3ccb77b
font_02_sfnt_off00013fd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FD4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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