Malicious PDF — malware analysis report

Static analysis result for SHA-256 61c3bc85510e05f3…

MALICIOUS

PDF

61.2 KB Created: 2021-09-09 18:33:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: c35e6bb105a3d456b7f0b0db093df547 SHA-1: 3043ac412cd65eef5772eb309e2b569000496e1c SHA-256: 61c3bc85510e05f3f12ad10aff2e436314d307b4d54922b2a20779da3572a676
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, with a high heuristic score indicating malicious intent. The presence of embedded JavaScript suggests it may be used to redirect the user to malicious sites or download further payloads. The document body is heavily obfuscated, but the overall structure and heuristic firings point towards a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7784

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://veaodaibrahma.com/uploads/image/files/20485848854.pdf In PDF document text
    • https://inprovit.com/ckfinder/userfiles/files/fozolematanon.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109030100472715.pdfIn PDF document text
    • http://portalpr-b2b.es/img/user//file/_0451268001630670193.pdfIn PDF document text
    • https://valve-toho.com/userfiles/file/zozikibevuf.pdfIn PDF document text
    • http://surtek.biz/image/files/20150319_080930.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/c7eeec8107008b0848a2ed78cef3b9fe/jerodeda.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/161394f01e4486---58607941560.pdfIn PDF document text
    • http://lexus-custom.com/js/upload/files/vaxebijasuxina.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/wizamemugokewodizevi.pdfIn PDF document text
    • http://homokkepek.hu/editor_up/70659373872.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/fopopiniwijulukukozeboza.pdfIn PDF document text
    • http://czernavendeghaz.hu/admin1/file/xewexado.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/15455826275.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/920510479.pdfIn PDF document text
    • http://www.eatvirukai.lt/uploads/files/gurivutunasilad.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/gumefor.pdfIn PDF document text
    • http://harissarantis.com/userfiles/files/bofeno.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210902114706_585722616.pdfIn PDF document text
    • https://www.cascatai.com.br/ckfinder/userfiles/files/lorutalomugipudoligeneno.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/pekabewibososavimoteza.pdfIn PDF document text
    • http://mojahotels.com/ckfinder/userfiles/files/sadinuxenowemejuwodixa.pdfIn PDF document text
    • http://baloneacessorios.com/_upload/file///sigilujul.pdfIn PDF document text
    • http://emrc.ie/upload/imagecontent/file/lotovunubinanawiru.pdfIn PDF document text
    • http://kukdae.com/files/fckeditor/file/zavorasupotaliv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=how+to+check+my+own+phone+number+androidPDF 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_off0000dc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2A 11088 bytes
SHA-256: 89f588fd0f07dde5ffed6bec571c6c5410d9c07927fd1b4fdb75524d2713ae11

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