Malicious PDF — malware analysis report

Static analysis result for SHA-256 2aefa9acb3fd5ecd…

MALICIOUS

PDF

86.5 KB Created: 2021-07-07 05:15:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: c96574fdd13e6503b2a49e9306240bf1 SHA-1: 025b123988e88c7a507589c77d6c073196aff82d SHA-256: 2aefa9acb3fd5ecd52ff5ac3ecfc9d1b5df5dad0e5198ec8a1d6ca7943e14e56
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable domains, indicating a link farm or phishing lure. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs and the heuristic firings strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9848

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://habitat3.eu/userfiles/files/pebaribisu.pdf In PDF document text
    • http://davidhammerstein.org/userfiles/file/tupafexapiwa.pdfIn PDF document text
    • https://pellevah.com/upload/files/32873067863.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607314dddfb8f---94127426638.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/9jqa473m1ke7ti9trutvgfel2i/tozakuvolikejudamumi.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/tujagovarapub.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/99348395036.pdfIn PDF document text
    • https://orangerun.re/photo/files/pagum.pdfIn PDF document text
    • http://cdwy028.com/uploadfile/file/20210618161509.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/25698560343.pdfIn PDF document text
    • http://cinstech-inspect-survey.com/fckeditor_userfiles/file/bemodojumixobinonudalaf.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090786808daa---kolavojikatenex.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/mexugiza.pdfIn PDF document text
    • https://dildendilecevirievi.com/upload/ckfinder/files/lumegom.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/4a518dbae41b3bb271f75ef1df61a763/12120685524.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/belisoxipu.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/vsntvte9gu3oipqtv64h42udda/2580377208.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/ce4dfeaa1ae8d005f8e2452ed9d4c365/92561527434.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/2959047399.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b05430ba13---79766091489.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/189ff2ee9c2236cb8927e63ed1e2c2d9/75446978921.pdfIn PDF document text
    • https://pmsp-me.com/userfiles/files/baxuzupolovunorenaz.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098acc080bd9---7352688446.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160833a7f0613b---tutig.pdfIn PDF document text
    • http://noahsmarinesurveyors.ca/userfiles/file/82945677791.pdfIn PDF document text
    • http://ncabhsa.com/clients/875427/File/65929635973.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=bible+verse+about+parents+being+wrongPDF 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_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 16776 bytes
SHA-256: 1d26075153735a2a3ff0b203a34e47656c04c64580d4da8665a527078069b422
font_01_sfnt_off00011b35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B35 10872 bytes
SHA-256: 0627f274142424109aca56db30441046c67aba834b8f7b1404f09f1ff41f70bf
font_02_sfnt_off00013454.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13454 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1