Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cdb2f3371f14e70…

MALICIOUS

PDF

91.9 KB Created: 2021-08-03 07:46:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 87878d391f3b5b1cfec6df3d2a4b038a SHA-1: be949ef244997b91db2a1e089d2ce6e1b78c7f74 SHA-256: 0cdb2f3371f14e70db0dc47a1ed8ec0aebbc705eda06e7f462a061797f3335c6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a link farm pointing to various domains, many of which are hosted on compromised CMS upload storage, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure indicate an attempt to redirect users to malicious content.

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://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/7rbt5f38aapq874avstc4c4h81/8909594831.pdf In PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/xinutomugodawovoduvix.pdfIn PDF document text
    • http://smart-ventures.ch/upload/Editor_Images/files/vusokurebapomewimiwijotov.pdfIn PDF document text
    • https://purefeeling8.com/data/file/renelefufikulipafu.pdfIn PDF document text
    • http://go-pxl.com/uploads/files/nikamatilasutow.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/44816178685.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/rovusaju.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/sawadazumumotuju.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/lenupigu.pdfIn PDF document text
    • http://josephpowellfamilyreunion.com/clients/0/04/04c15d356d3082020e114f8c0300f46e/File/64476561814.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/65037ac7c1405dfedfe07160c0df3b56/zimasobezowofuxemotak.pdfIn PDF document text
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5d6d1ec83---zenew.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b878f331cf4---fezasuvujikunomaz.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/dubuzogokiketorejexomejo.pdfIn PDF document text
    • https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/195b6de0ebddb8bf3a6a5712723cc577/bezemegisaf.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/womajavikozeriwezewo.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/34412634688.pdfIn PDF document text
    • http://kolasinprevoz.rs/slike/files/zolelozizegoxidosi.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/54795222451.pdfIn PDF document text
    • http://niszczeniewaw.pl/userfiles/file/zolega.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160af0056aa790---rivumakeb.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/19fd9c0a4500201366371fbab8ed9504/84514414152.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=geometry+dash+2.11+hack+apk+androidPDF 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_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011adc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADC 17408 bytes
SHA-256: c3e48d0dda810ea06724c8563e12513cdd69b78f0a2bcd4bb5961cb833842755
font_02_sfnt_off000147f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147F2 11216 bytes
SHA-256: 08484012233806e4824058db36236f2028de2361c035836984499fcee0e16f47

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