Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cfbc87671e02f1…

MALICIOUS

PDF

63.9 KB Created: 2021-09-14 13:15:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bb548474f19a07cc1c6d03f5135840c7 SHA-1: 0e2464aff8238900304fff23c7c4348df943d74c SHA-256: 14cfbc87671e02f1525217575372a93caf58573c94e149652cfcf6b07ce16eb0
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to distinct domains, indicating a link farm designed to obscure the ultimate destination. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic confirms this, suggesting a phishing or malware distribution scheme. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely related to directing users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7964

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://sqc.jp/user_data/editor/ckfinder/core/connector/php/upload/files/xejekiwabakokowigoxilufo.pdf In PDF document text
    • http://portalpr-b2b.es/img/user//file/_0352853001631356152.pdfIn PDF document text
    • https://matrainagycsalados.hu/userfiles/file/bobabavasekumepamusizamo.pdfIn PDF document text
    • http://3e-machinery.ru/app/webroot/filesfiles/92666504057.pdfIn PDF document text
    • http://rudolphi.nu/userfiles/file/robosavoseruxif.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/57562112372.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/93753545245.pdfIn PDF document text
    • https://accounting789.com/ThImg/file/zuwejanuduxekikinagovi.pdfIn PDF document text
    • http://indel.sk/userfiles/file/18419411995.pdfIn PDF document text
    • http://nujhimachal.in/img/uploads/files/nezejeru.pdfIn PDF document text
    • http://resetimpianti.it/reset/public/file/suxaxijavova.pdfIn PDF document text
    • http://fruitvita.com/files/files/nurogulebuzaw.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136c89d6174b---josizolukufovamavagomepam.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/libubomitewo.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131fdb037316---60879600022.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/divopebiwukifoso.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/36343988684.pdfIn PDF document text
    • http://kesherisrael.com/uploadEditor/files/6614739949.pdfIn PDF document text
    • https://www.ijdsir.com/ckfinder/userfiles/files/fejonanemulera.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/88109945458.pdfIn PDF document text
    • http://chapraptti.org/userfiles/file/84856617447.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/7520943681.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=best+ios+features+over+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_off0000d153.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD153 17136 bytes
SHA-256: 2a1ca7ab1012dea932e51516e8afec2d8206fe21aab59d839aa06134e0331340

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