Malicious PDF — malware analysis report

Static analysis result for SHA-256 69562f15a1c7dbd6…

MALICIOUS

PDF

76.8 KB Created: 2021-09-08 14:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: d80dbe5208c4cf60f6741cfe66200241 SHA-1: 316a2cb1ad7e7573c9f37922863e4e51f606c73c SHA-256: 69562f15a1c7dbd661d2c2756f148417c244d74cd5af2a9ceb1d837ced15baed
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs pointing to disposable hosting, indicative of a phishing or malware distribution scheme. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests the document is designed to host a collection of links, likely leading to malicious content. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://pixomot.ru/uplcv?utm_term=exportar+planilha+excel+para+pdf PDF link annotation
    • http://pnalog.ru/images/file/demezopikodamoferizi.pdfIn PDF document text
    • http://mecaniquekd.ca/upload/file/tagasitadi.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/lufolevib.pdfIn PDF document text
    • http://manilag.com/FileData/ckfinder/files/20210905_C70D43D4FD197E24.pdfIn PDF document text
    • http://galantemontagnana.it/ckfinder/userfiles/files/burisar.pdfIn PDF document text
    • http://titibbs.xyz/js/ckfinder/userfiles/files/jisuwum.pdfIn PDF document text
    • http://snft.ro/media/file/zuturawaneta.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/86779464548.pdfIn PDF document text
    • https://begili.com/uploads/image/files/94762325143.pdfIn PDF document text
    • https://812423.qqtogeljackpot2.com/contents/files/sebabisotizizuvewifa.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/5t59eq6ro72gj88sq7agve22s3/vimuboguwotoravenoxobe.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/wovexozofuwudijunil.pdfIn PDF document text
    • http://gt-outillages.fr/ressource/site-image/files/vovabegamirekis.pdfIn PDF document text
    • https://saraelv.no/wp-content/plugins/formcraft/file-upload/server/content/files/1612f1a306669e---gafatizapasa.pdfIn PDF document text
    • http://chpcentre.com/files/file/vupotujenejefasonixopir.pdfIn PDF document text
    • http://phdpecs.hu/userfiles/files/bipivi.pdfIn PDF document text
    • http://ctm.it/userfiles/file/movukufivibigukivam.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f9ce823f4f---besuxovikizigewuwodive.pdfIn PDF document text
    • http://ericshartman.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/19225866860.pdfIn PDF document text
    • https://www.agencesramos.com/ckfinder/userfiles/files/faxazikilabivurawefaladi.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/7f786d1ea7a755b0ab7e09bc6dc9dace/tijuwariditemoduxu.pdfIn PDF document text
    • http://yongchengtech.com/uploads/files/202109071425104589.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///gerabujuri.pdfIn PDF document text
    • https://blogsma.com/files/rogipodunidazexova.pdfIn PDF document text
    • http://monterroso-construpuntos.com/campannas/file/lageravejolin.pdfIn PDF document text
    • http://labradory.pl/file/balikejipiwus.pdfIn PDF document text
    • 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_off0000c742.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC742 10632 bytes
SHA-256: c4bc2cc5cb9e286df93f3f3f0d8453573143d0c256527241661ccb65f624ec7e
font_01_sfnt_off0000df6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF6F 17904 bytes
SHA-256: 8f15e103dd0c2c99d4603afc6e72c62e3ea769b4e61f3909d8b38f9b127e1e69
font_02_sfnt_off00010d1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D1A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1