Malicious PDF — malware analysis report

Static analysis result for SHA-256 af619f570e44d34d…

MALICIOUS

PDF

63.8 KB Created: 2021-09-22 21:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 69525fc2c24f463085c1fea40e4bc271 SHA-1: 8469d1454ae021d4edefe306a0c6c34f10c06086 SHA-256: af619f570e44d34d9e8d9d044a919f7fe0f183fa749d6ac5f6563cea7d7ddebc
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains embedded JavaScript and a large number of external URIs, many of which point to disposable domains, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to malicious sites or the download of further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5692

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.
  • 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
  • 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://iva-vietnam.com/userfiles/file/64644773555.pdf In PDF document text
    • http://remaining-mc.de/userfiles/file/72142922098.pdfIn PDF document text
    • http://dealershop.es/userfiles/file/buribugenotopimiwimipame.pdfIn PDF document text
    • http://kangshi-you.com/uploads/files/202109100946424648.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/gazonedokoninatigemelu.pdfIn PDF document text
    • https://quatcongnghieput.com/uploads/files/97041167202.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/48729632504.pdfIn PDF document text
    • http://khyljg.com/uploadfiles/files/92815128814.pdfIn PDF document text
    • http://ndt-ultratech.com/files/10252730963.pdfIn PDF document text
    • http://andrenickels.de/ckfinder/userfiles/files/koguzovoniwosakatuxodesu.pdfIn PDF document text
    • http://www.ville-civaux.fr/admin/js/ckfinder/userfiles/files/gawotupabejer.pdfIn PDF document text
    • http://aktien-analyse.de/images/File/60391216262.pdfIn PDF document text
    • http://cyuanmei.com/userfiles/file/8470442689.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/33934893949.pdfIn PDF document text
    • https://gretajensen.com/ckfinder/userfiles/files/95221865698.pdfIn PDF document text
    • https://signos.larrialdiak.es/files/galeria/files/71368022047.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/nixuwedagafudi.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/desemoradoxoziradoz.pdfIn PDF document text
    • https://aaaxxion.info/images/file/32265818397.pdfIn PDF document text
    • http://studioghittigargnano.com/userfiles/files/nuxixapafulududorumazopo.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109182135385496.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/zebirudanegegamubizibul.pdfIn PDF document text
    • http://bigbazar.cz/is/images/FCKeditor/File/53320572965.pdfIn PDF document text
    • http://kronikarp.pl/ckfinder/userfiles/files/fejufapajomirepenix.pdfIn PDF document text
    • http://gdlianyu.com/uploadfiles/file/nebibakewavolijaju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=game+android+mb+kecilPDF link annotation
    • http://perfecturology.cafe24.com/upload/editor/imagefile/gijujazopusepanenebofewix.pdfIn PDF document text
    • 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_off0000dfaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFAF 10536 bytes
SHA-256: fa7ffc03a8db88c00955966dc963145581360ef32a5ff78200a36bda03e2dee5

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