Malicious PDF — malware analysis report

Static analysis result for SHA-256 78680035b4f57bc8…

MALICIOUS

PDF

54.0 KB Created: 2021-10-18 05:10:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: a45d4a42989433d60931bd848e94326e SHA-1: 1f8e52a9bb4c641edaefd250082b5f1cf3aecdb2 SHA-256: 78680035b4f57bc825535b425e4d20a3bffd774d676960319f5700e493d419a5
124 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm with numerous external URIs, suggesting an attempt to redirect users to malicious sites. The document body is heavily obfuscated and appears to be generated by wkhtmltopdf, further obscuring its true intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8244

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 https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/48614954079.pdf In PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/pikebasanisunodov.pdfIn PDF document text
    • http://tallygroupkwt.com/uploads/file/68320393162.pdfIn PDF document text
    • http://jjteriyaki.iorderfoods.com/uploads/files/71711275705.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1615859c44a709---54153061275.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/pupusigutiloresaniwozulow.pdfIn PDF document text
    • http://fanghsin.com/uploads/files/202109260251543546.pdfIn PDF document text
    • http://ydis.kr/userfiles/file/031816251819.pdfIn PDF document text
    • https://basisangka.com/contents/files/73387743331.pdfIn PDF document text
    • http://avtosfera28.ru/userfiles/file/29256452116.pdfIn PDF document text
    • http://aunay-sous-auneau.fr/ckfinder/userfiles/files/vopupakudo.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/40328629396.pdfIn PDF document text
    • http://portalinmobiliario24.com/uploades/fckeditorfile/mifajojamujimuj.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/wulukudugomadi.pdfIn PDF document text
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/tibasasemenotexap.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613c564ca9f61---kazasugoxogegerikedubu.pdfIn PDF document text
    • http://cafegreenwichvillage.com/uploads/files/bejutozisodifixu.pdfIn PDF document text
    • http://wych123.com/upload/files/fiditexasijamejimot.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/89597041550.pdfIn PDF document text
    • http://yeongwonenc.com/userfiles/file/wewowavixeximejedoru.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/96938102172.pdfIn PDF document text
    • http://sgo-bage.com/public/files/files/gogowukuzibajoxek.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/1hHberoKktI/uplcv?utm_term=the+pearl+that+broke+its+shell+pdfPDF link annotation