Malicious PDF — malware analysis report

Static analysis result for SHA-256 30ed8ad9379ccd1e…

MALICIOUS

PDF

72.4 KB Created: 2021-08-28 07:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 6c48dc35d12b81e7f5c18524fed70686 SHA-1: 7aec35f4b859991ab4fceea51cd69bff9ba95741 SHA-256: 30ed8ad9379ccd1e99bb474fba100580116b27f008c9a5963321852fbda661ed
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm hosted on compromised WordPress sites, with numerous distinct hosts and URLs pointing to potentially malicious content. The presence of multiple 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' firings strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/8fut4iihschu6ns0d2vsm3l4f0/refikabegipuvevibop.pdf In PDF document text
    • http://yomamasushitogo.com/uploads/files/6170788286.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/52057525113.pdfIn PDF document text
    • http://globalsocialwlefaresummit.com//app/webroot/uploads/ckuploads/files/xesakenokawalabunaxo.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/97510123788.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/cqaln71nvno93is209gnu456l7/2693136593.pdfIn PDF document text
    • http://www.impactit.in/ckfinder/userfiles/files/97903621105.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609db30dae230---62096666280.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/56e5e31ea863b918834e463f94648f07/91739882243.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/3705a4a12dfc11a153380f7207e16cc1/telozirefalaberimetizaveb.pdfIn PDF document text
    • https://agatanorek.com/files/file/47548011429.pdfIn PDF document text
    • http://hanasushi6.com/uploads/files/kudebetajifido.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088327700180---nadutefimawaruzezamuda.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/43151391913.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/8282a20ddfaaf99ec91868b585fc5c4d/76100185557.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/92794160097.pdfIn PDF document text
    • https://forcechicago.com/wp-content/plugins/super-forms/uploads/php/files/d68499c8064420f3294f3245af54eee2/tamowuxaxoliwede.pdfIn PDF document text
    • http://dunajecbiala.pl/upload/File/98363191548.pdfIn PDF document text
    • http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/61d009045cbd383bd01d639a98eb9b90/lutalegufoditiko.pdfIn PDF document text
    • http://adamlegal.com/userfiles/file/93095646269.pdfIn PDF document text
    • http://giadinhlaurenso.org/upload/files/45978470330.pdfIn PDF document text
    • https://autonoleggioassereto.com/file/85788469460.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/0pk0u0n1rg7gd5b6trq1qri3u7/3110617835.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=spiritual+home+meaningPDF 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_off0000b94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB94E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d160.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD160 16136 bytes
SHA-256: 1bc7c7c67e9fcc9e160aa200d04a72caa0ac0ebf13fe7b113253f23536ad3cb0
font_02_sfnt_off0000fa9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9E 10708 bytes
SHA-256: bdfad50da05cc505e3016d8d3480442f6986a4bc43f3b5b0568b4d95cc4db0e3