Malicious PDF — malware analysis report

Static analysis result for SHA-256 67d9d5ade4385c2a…

MALICIOUS

PDF

78.8 KB Created: 2021-08-03 20:28:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 76efa5d2736576cb462a1cb64baa4c24 SHA-1: acb555ea17d49706c1362b0ef735a520bfba5488 SHA-256: 67d9d5ade4385c2a7ec379fa4a06f4917dddbebff279c521f7a1dcfb191f2391
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many pointing to compromised WordPress sites, which function as a link farm. These links likely lead to further malicious content or phishing pages, indicating a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1608888ad31472---69123848393.pdf In PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c889976fa99---lujutemofanuvufogutako.pdfIn PDF document text
    • https://123natura.com/stockages/files/xaxutedezukagogabapag.pdfIn PDF document text
    • http://gtlmarinefuel.com/userfiles/file/todozof.pdfIn PDF document text
    • http://atthaya.com/file_media/file_image/file/47744154060.pdfIn PDF document text
    • https://childprotectionindia.com/lexcyberia/userfiles/files/lipewi.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202108012359277991.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/5492190637.pdfIn PDF document text
    • https://t2sc.me/userfiles/1179083741.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b6c70e96d---xexijubivopobokilojepi.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092664613ff0---luvedadefowibil.pdfIn PDF document text
    • https://bandotrading.it/uploads/file/44839919767.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3d4b0b8d295d1acc95f5230803c5dfb1/wasulugi.pdfIn PDF document text
    • http://sanruou.com/app/webroot/uploads/files/99794714977.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/5237837cc08dc9d2ff201764b0300cfb/fanabomajejanerovabegi.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/35748087085.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aa049c86d28---dewivisisovipomo.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/25fe55bd57e2fb8375b0c5b4a2a91c8d/fijowaleg.pdfIn PDF document text
    • https://coevent.ru/upload/files/veruxusif.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/vubejubirupu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/ddef16a4650f6789f09386e6869932e9/levexasopuvapi.pdfIn PDF document text
    • http://topas.lt/userfiles/file/33480432118.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b27dda1020f---36868376403.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=grammar+worksheet+for+class+5+englishPDF 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_off0000cea1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e6b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B8 11136 bytes
SHA-256: b9a0350e9e187a9017d093f940ca15dca67d6ad88c287a6e8f7da1da7167ba1b
font_02_sfnt_off000100b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100B2 16580 bytes
SHA-256: fc58f92a9151e38b44c5c74278eabf0fc43e3c423d22a3a5c8e9f8f98bc97667

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