Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f710e84d42d3af2…

MALICIOUS

PDF

120.5 KB Created: 2021-08-12 18:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 02f6c5d023560743b0d439e15759bf7b SHA-1: 1a17fcd2a5764d370a331a1bfcfb0a3ba126d4bc SHA-256: 9f710e84d42d3af2f569ab15bb1b59fda3ba66c58ccbce7275490e0c68d5c2fc
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document exhibits characteristics of a phishing lure, indicated by the 'SE_PASSWORD_ARCHIVE_LURE' heuristic and numerous links to compromised WordPress upload directories. The ML classifier strongly flagged this PDF as malicious, and ClamAV detected it as a phishing trojan. The document likely aims to trick users into downloading a password-protected archive, which would then require them to obtain the password separately, potentially through further social engineering or by visiting one of the provided links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085a17c41602---pikajutelinizanajuguz.pdf In PDF document text
    • http://trips-in.com/ckupload/files/90207028925.pdfIn PDF document text
    • http://beachfirebrands.com/userfiles/file/95458677439.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/01c4de7b7c0ff02dab9a787ee68e9cbb/50242690697.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/87894756921.pdfIn PDF document text
    • https://werbemittelag.ch/upload/file/46675151771.pdfIn PDF document text
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/bd56e7b17ece4b30d5bed961c5d4c728/24382862338.pdfIn PDF document text
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/ec97b9ca044b5594f18011e49cdefc60/pefimugixote.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160973fe3dab40---80958374492.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/68856178888.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/1m40stuleaul910gf6leb5b1a6/gufofiwumel.pdfIn PDF document text
    • https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/e5ca8c6afa50dda357914b0ff5ce84c8/56116489022.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16085f4b995dff---21657504029.pdfIn PDF document text
    • https://turismo-galicia.es/ckfinder/userfiles/files/parun.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607624020db95---94192789439.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/kubujawabumujifusezavifaf.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160883efc35b5d---durexipetawizeri.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090b9ba05d5c---96402148074.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099016a28741---62361365761.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b22c1bc8fe---30123119597.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/81068190486.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ju4evmgknk5vujp080vjubu0mp/fejuxomakinog.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/53f116620c34cf27268a898c9a262020/34110265608.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/aik439jmccdna10n07kk4a60u6/nudugeluwolutexuvojazare.pdfIn PDF document text
    • http://rafaelokazakov.com/file/2245925701.pdfIn PDF document text
    • http://navrattan.co/userfiles/file/benegupuropadasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=las+cronicas+de+narnia+1+pelicula+completa+en+castellanoPDF 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_off00016ee4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000186fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x186FB 10784 bytes
SHA-256: b8254c1b7c6c131a42361dc02c7afc48865253b98ef5d82738655474b092a94a
font_02_sfnt_off00019fd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19FD5 19240 bytes
SHA-256: b9b73c94562fb45bee90db2a0f9c74403bddbcf3e18fa1f158542cf47ba7f531

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