Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ff4bcd0854fcb3…

MALICIOUS

PDF

66.5 KB Created: 2021-10-11 19:59:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7279ec92c3ee0e8030d95889a5baa91d SHA-1: 7d06f7cf1c478c3d15972a332b3aa6f11a8e4274 SHA-256: 49ff4bcd0854fcb32080a1a80dee568e72c1a7568a7b3802db6f6b05150a008e
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to disposable hosting and are likely used for phishing or to serve further malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to external sites. No scripts were extracted, but the presence of multiple external URIs points to a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5262

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://ketchas.ru/uplcv?utm_term=procurement+questions+and+answers PDF link annotation
    • https://www.truck-transport.com/ckfinder/userfiles/files/lofabeziv.pdfIn PDF document text
    • http://www.ags-sib.ru/ckfinder/userfiles/files/70473914070.pdfIn PDF document text
    • https://ego-sofa.tw/uploads/files/202109171316397912.pdfIn PDF document text
    • http://www.sm.ac.th/ckfinder/userfiles/files/zemapibexe.pdfIn PDF document text
    • https://jsptti.com/ckeditor/ckfinder/userfiles/files/sarugekofadedelupirimo.pdfIn PDF document text
    • http://frutapacargentina.com/ckfinder/userfiles/files/zibuxem.pdfIn PDF document text
    • http://balatonfurediallatorvos.hu/userfiles/file/89521956014.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/zupodato.pdfIn PDF document text
    • http://xn----7sbabaajmdfbk3ddf3azka3b6a2r.xn--p1ai/ckfinder/userfiles/files/97972370748.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/169240124.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/xubesonaporalogefu.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/bakuligekugulof.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/nalawojepoduwufafujixozoj.pdfIn PDF document text
    • https://takitech.hu/userfiles/file/33638097671.pdfIn PDF document text
    • http://moriefrusca.com/userfiles/files/nutolidakijirowogoniva.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/22760246642.pdfIn PDF document text
    • http://anhuizhkj.com/upload_fck/file/2021-9-29/20210929155343572142.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-10-8/20211008014359590542.pdfIn PDF document text
    • http://perevodvnegiloifond.ru/pict/file/jevunebinena.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/nagibitafiwopafabiwones.pdfIn PDF document text
    • http://knipia.com/userfiles/file/97751611355.pdfIn PDF document text
    • https://maria-galland.ru/files/file/31609728918.pdfIn PDF document text
    • http://blfimmobiliare.com/userfiles/files/wiwajomibo.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/83700251720.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/mukiput.pdfIn PDF document text
    • http://motovelo-nmsk.ru/userfiles/file/68344166564.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_off0000e5e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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