Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f4ca55836d0e2ab…

MALICIOUS

PDF

72.9 KB Created: 2021-09-18 07:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f6113fd2ff88c4a7410f0802507eedfc SHA-1: 4fef491be001a989a1bdff60cc9c0cc2c9d4c7c0 SHA-256: 7f4ca55836d0e2ab77932142335212208fd004216f22fb92460aa51ae513c1db
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be disposable or low-reputation. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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
  • 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://confidenzacsapagy.hu/upload/ketudu.pdf In PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/desanevebutejat.pdfIn PDF document text
    • https://limsurempat.com/contents/files/jozenelufanamapagiz.pdfIn PDF document text
    • https://chandrakantmusicacademy.org/ckfinder/userfiles/files/wujumibupupexememux.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/16135cb31eb4fe---gakixumaj.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/msmk5ml6agf4b5n6nd05tljvd0/17613595188.pdfIn PDF document text
    • http://yey.uw52.com/upload/files/zusoxazuvofujug.pdfIn PDF document text
    • http://jts-electrical.co.uk/ckfinder/userfiles/files/25250506129.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/wopadirokifagarimipajuzu.pdfIn PDF document text
    • http://kingsbrite.com/kingsbrite.com/userfiles/file/fotibosexozox.pdfIn PDF document text
    • http://vendsol.com/userfiles/file/neraretijezoralomej.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/7151258484.pdfIn PDF document text
    • https://hotelreviewreserve.com/basefile/hotelreviewreservecom/files/56626716227.pdfIn PDF document text
    • http://jobsmarttampabay.com/files/public/81844943013.pdfIn PDF document text
    • http://szpital-sulecin.pl/images/fckfiles/file/sovarug.pdfIn PDF document text
    • http://lpc2529.com/piceditor/file/mibewosoxisezoju.pdfIn PDF document text
    • http://archifolder.com/userfiles/files/puruwarep.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/kurogizokopivexufejoduzev.pdfIn PDF document text
    • http://szpk.hu/_user/file/jofobajividosasuda.pdfIn PDF document text
    • http://tehpromyar.ru/media/file/towokunedafa.pdfIn PDF document text
    • http://dobermanncz.eu/files/55525077010.pdfIn PDF document text
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/nidozapobazix.pdfIn PDF document text
    • https://debden.org/userfiles/file/In PDF document text
    • https://youkuvpn.com/upload/files/guregevoxefuxigekin.pdfIn PDF document text
    • http://kite-surf.sk/files/99448950149.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=civilization+3+android+apkPDF 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_off0000ba2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD243 10508 bytes
SHA-256: d9b1326c7116ac64a7baf842c7baa8ec031dd972454c7edc75117795dd18c5a6
font_02_sfnt_off0000ea58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA58 16796 bytes
SHA-256: 4f1020408f29448d3fcf4011758a65dda96b6abc6063cded782f1a49d856b411

Open this report in the interactive analyzer, or submit your own file for analysis.