Malicious PDF — malware analysis report

Static analysis result for SHA-256 abeb3fda9e717eb4…

MALICIOUS

PDF

93.9 KB Created: 2021-08-17 20:47:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 405b8a7c63340ef473d0b7dc53196260 SHA-1: 9bfbaaa559ce4f450afef3edb0be81fb8396af23 SHA-256: abeb3fda9e717eb45b93690768aeb1005c68f9383334d8f5e62d485d2cbc2dd1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript, suggesting it attempts to execute code, likely to redirect users to compromised WordPress sites or other potentially malicious URLs. The presence of numerous links to disposable hosting and compromised CMS uploads further supports its role as a lure for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9866

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ccf3b196481---gosijuk.pdf In PDF document text
    • http://wijnhuis-vaessen.nl/site/data/ws/files/lojajejupagerixufibemo.pdfIn PDF document text
    • http://dzbnf.com/upload/file///sekaxuzetimodipojivuxanoz.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111654443a56---95709976127.pdfIn PDF document text
    • https://onelineservice.it/file/pizojofemezawi.pdfIn PDF document text
    • http://waterlootour.com/FileData/ckfinder/files/20210803_EA4AA95F060D970F.pdfIn PDF document text
    • http://lungtransplantopen.com/clients/d/de/de7cc03d42bda6b8b84c8ac9728529bb/File/mizisetamiruzelamigar.pdfIn PDF document text
    • http://generoussecurity.com/uploads/13313563809.pdfIn PDF document text
    • http://fatamorgana.fr/uploads/assets/file/53755942685.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/qpl88h85el2tn99va94sjbq6oo/10173387880.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/83276076663.pdfIn PDF document text
    • https://eclearusa.com/images/file/kenugitusowenobunudovenos.pdfIn PDF document text
    • http://baliretreatcenter.com/olabali_ci/media/images/newsfiles/xezutosuwufilamalitazax.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5990f50abb17ba5d320f8d3eb50bce00/xozamezilotizi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/0b9ebf482c614817d791433c69653a7b/23488263363.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/95319444686.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/5b41011ea1b0ad8e7676ff7cd82bf1ff/xamunajetupun.pdfIn PDF document text
    • http://lucchetta.net/userfiles/files/pupanidavowivojelu.pdfIn PDF document text
    • http://xn--clinicaquirogavilario-vbc.com/wp-content/plugins/super-forms/uploads/php/files/4j3pja8v2vbfg9lq4rj0l6hk00/87320608866.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1610e179f7759a---97122275732.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f035d5b43c---fegobaxipifitunaragisu.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d61a2f983e7---73105327758.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/tonilepoxetaso.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5be16ec55d---2097743033.pdfIn PDF document text
    • https://cargobull.cz/res/file/jefitugotononifudewufoto.pdfIn PDF document text
    • https://soyana.de/js/ckfinder/userfiles/files/dekulegoxivurerotitifofaj.pdfIn PDF document text
    • https://506hlapeta.com/files/file/labapazofawobumegaxuk.pdfIn PDF document text
    • https://rcot.org/userfiles/file/47658799802.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=como+descargar+libros+gratis+pdf+sin+registrarsePDF 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_off000105e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E7 11132 bytes
SHA-256: bab9beba86807e25a974f470fad84d95357cfd476fcc6239a5b35e8021f2920f
font_01_sfnt_off00011f71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F71 18360 bytes
SHA-256: dce235493b4564086a38cd76470eff8e4f9fda75d559d3c50e30103f81897645
font_02_sfnt_off00014e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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