Malicious PDF — malware analysis report

Static analysis result for SHA-256 26460d83d7c2dec6…

MALICIOUS

PDF

74.8 KB Created: 2021-07-23 14:49:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 23a9ac66516ba68c6cb67f16568450db SHA-1: d2356b3b5c8e3728a0cd3693561b3a3be09fccd8 SHA-256: 26460d83d7c2dec67c9d00c15a7ebef33e05d2a970ce112cecba05e41650537d
154 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The presence of multiple links on disposable hosting further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9677

Heuristics 5

  • 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
  • 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://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/74a3e97251ed73fac907baeebd03c0a9/95942362992.pdf In PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160faa50145abf---litupizakebomufesizamix.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e08e419cb---sufor.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160773c4965dd3---veredozurakugugewadovu.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74536a5fa9---39673464776.pdfIn PDF document text
    • http://lighthouseofworship.com/clients/44803/File/jovipitetazaje.pdfIn PDF document text
    • http://5lovestartw.com/CKEdit/upload/files/77226190939.pdfIn PDF document text
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/c880f57abe32f30496c9cb4f02c310b7/51526448534.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/a64df169879173fda6c8d99991f3c7fa/memida.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40c8bd7331---tajanejalularawoxaf.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99762437014.pdfIn PDF document text
    • https://happycolaborativo.com/uploads/files/pilig.pdfIn PDF document text
    • http://drivescuolaguida.it/userfiles/files/54753975058.pdfIn PDF document text
    • https://himarco.ir/basefile/himarcoir/files/paguxow.pdfIn PDF document text
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/5a26a3cb035fa4a8af6e6de151c1df4e/13721977693.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0a02e3463---14173193241.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/7gqhb4rpang451lbg08uahrbas/18592629062.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c2ffbc03f1---53125256655.pdfIn PDF document text
    • https://energooptima.hu/upload/File/repabimorigaze.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c0c2c081dc---82480690536.pdfIn PDF document text
    • http://septumdent.com/img/userfiles/files/1157136871.pdfIn PDF document text
    • http://brighterhealthcare.co.uk/wp-content/plugins/super-forms/uploads/php/files/5dpql98fu70969o1gr06pgh7r5/55766725167.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=asking+questions+about+cultural+anthropology+a+concise+introduction+chapter+1PDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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