Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f95d9b6d3d267e8…

MALICIOUS

PDF

81.5 KB Created: 2021-09-03 17:28:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 9faeda47b6de07e888c3aca3bfddf411 SHA-1: fa187ff6457e8b1ad2afadcc1735e1309793aaf7 SHA-256: 0f95d9b6d3d267e88c95b93be7efdd07f9cc52850d4ad166601f3b87baab7577
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as a link farm, with many links pointing to disposable or potentially compromised domains. The ML classifier and ClamAV also identified it as malicious, specifically as a phishing trojan. The file's purpose appears to be to lure users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://dollreunion2020.com/clients/4/43/4392dc7a9e9236654a628da0af121bbb/File/61667441268.pdf In PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/233ab2bf762da598d57bdee47ead0246/94092025992.pdfIn PDF document text
    • http://technoarc.net/userfiles/file/simifivizojepelilo.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a4628b5bea7---vesojidedajefuj.pdfIn PDF document text
    • http://prestinoequitacion.com/imagenes/upload/files/pakimeluridafiremenug.pdfIn PDF document text
    • https://kar360.com/resimler/files/18491837315.pdfIn PDF document text
    • http://geonatlife.es//ckfinder/userfiles/files/porogatuziduriroxafur.pdfIn PDF document text
    • http://somkuthyoptika.hu/editor_up/fivofipivajisabaposuv.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16072906a37485---37706022685.pdfIn PDF document text
    • https://jurad.eu/files/file/simave.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160e419e10e640---matapejajiduvadovafegubid.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/fajj56be2kq72a9n12lgdukf5t/fiserajakalebob.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/dfc12h9cd63k7loc0p61ff69r1/zivavoguperarodowozogaz.pdfIn PDF document text
    • http://strahovka66.ru/userfiles/file/9849981802.pdfIn PDF document text
    • https://www.urban-quartz.co.uk/wp-content/plugins/super-forms/uploads/php/files/df5c780b1aeadfdc4e7a3c446f9d5397/62570678154.pdfIn PDF document text
    • http://ecogestval.com/userfiles/file/18576256186.pdfIn PDF document text
    • http://labradory.pl/file/xivavazokuvamaza.pdfIn PDF document text
    • https://menu2uplus.com/images/file/9772281160.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/82955055716.pdfIn PDF document text
    • http://daearesort.com/FileData/ckfinder/files/20210619_A42802B11F0B7212.pdfIn PDF document text
    • http://orgue-chantepie.info/FCKeditor/upload/file/77050114391.pdfIn PDF document text
    • http://microcement.ua/userfiles/file/71135204886.pdfIn PDF document text
    • http://www.clc-engineering.com/siteuploads/editorimg/file/vipaziwufimuf.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=diploma+in+environmental+engineering+syllabus+pdfPDF 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_off0000d797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD797 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA9 18140 bytes
SHA-256: ae4288c7d588609da5b9bddebf9226c852c65d99971a9db547aec5b304e63f4a
font_02_sfnt_off00011e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E4F 11260 bytes
SHA-256: f401f69da5967ba49695b870e65e5615c1f65da4f159885c206110ab35e17f25

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