Malicious PDF — malware analysis report

Static analysis result for SHA-256 322d6a71b672aa4e…

MALICIOUS

PDF

66.8 KB Created: 2021-09-17 22:05:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 596c10289c4ebeba68e47ffa64e99766 SHA-1: 9cb46aef06ab7ce64064bc81a97a04a4fbdcff19 SHA-256: 322d6a71b672aa4e6cfb34fea90ffe295a97d9e8c6408c6a9431c5f39b0e9cf1
124 Risk Score

Malware Insights

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

The PDF contains a link farm hosted on disposable domains, indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content, potentially exploiting client execution vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7647

Heuristics 4

  • 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
  • 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://edu-family72.ru/content/images/uploads/file/rolalozusew.pdf In PDF document text
    • http://dongshengcable.com/images/upload/File/webabusumoxudivixopikeg.pdfIn PDF document text
    • https://muratay.nl/userfiles/file/popavavefuvanofavupemak.pdfIn PDF document text
    • http://uco-kampen.com/media/files/9670012760.pdfIn PDF document text
    • http://aptekarynek.pl/zdjecia/fck/file/99861680465.pdfIn PDF document text
    • http://bagiez.com/userfiles/file/77150639341.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/xuvon.pdfIn PDF document text
    • http://camelliafb.com/uploads/files/202109020727499192.pdfIn PDF document text
    • http://bandbaajabarat.com/ci/userfiles/files/kemifaradejizag.pdfIn PDF document text
    • http://humanlitech.com/files/files/83982279839.pdfIn PDF document text
    • http://dietgame.net/admin/fckeditor/data/file/20210903055756.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/xajegopefijunonak.pdfIn PDF document text
    • http://greenglobepms.com/uploads/6971466957.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/19639268210.pdfIn PDF document text
    • https://lensprovn.com/ckfinder/userfiles/files/98570504885.pdfIn PDF document text
    • https://martabaktelor.com/contents/files/noviv.pdfIn PDF document text
    • http://zzps.pl/userfiles/file/dijixatufomus.pdfIn PDF document text
    • http://archgeo-leszno.pl/uploads/userfiles/files/tadiroxosab.pdfIn PDF document text
    • https://www.aicsmindia.org/ckfinder/userfiles/files/88783815562.pdfIn PDF document text
    • https://petrovsky14.ru/docs/files/11331151786.pdfIn PDF document text
    • http://urbariatprasice.sk/upload/file/61784548425.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/17701063124.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/zosibavilumotoziliwa.pdfIn PDF document text
    • https://uleiuri.ro/userfiles/file/74637248818.pdfIn PDF document text
    • http://pedraferro.com/files/files/3614354920.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=free+download+parallel+space+pro+apkPDF link annotation
    • 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_off0000da66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA66 18584 bytes
SHA-256: 769408728e436ba74eda4929c10d4f71f02ddb403ed94a8181304b526cb2f7d0