Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d1ebd6b7f4b7b43…

MALICIOUS

PDF

38.7 KB Authoring application: Nitro PDF
MD5: 17aba25f35b070c4ba646836baa2559c SHA-1: 17cacc2fa276389ad2d6a32c7ab96b5c1b1152af SHA-256: 1d1ebd6b7f4b7b43f62347b93864d6a96c6aad51a1734428372c8fe6508adbea
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious File

The PDF file contains a large number of external links, many of which point to other PDF files, suggesting a link farm for SEO manipulation or phishing. The document body, though heavily obfuscated, contains references to a 'BT Hub 4 setup guide', likely a lure to encourage users to click the embedded links. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution via the linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.TtraffRobotInstall-7605656-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.TtraffRobotInstall-7605656-0
  • 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://jira.market-lm.com/uploads/2020/01/29/jigepemanikisi.pdf
    • http://greenaccountingservices.us/uploads/1/3/0/5/130588586/d6c147e690e4c56.pdf
    • http://tawuzus.vipiski-besplatno9.icu/uploads/2020/01/27/89d4a1eb.pdf
    • http://starry-way.ru/uploads/2020/01/27/5220304.pdf
    • http://wuxunen.takprosto.club/uploads/2020/01/28/xidizenaguk.pdf
    • http://wik.my-export.ru/uploads/2020/01/27/6811397.pdf
    • http://xanoja.aeronika.com/uploads/2020/01/28/puwisogewawogekamuf.pdf
    • http://encouragementor.info/uploads/1/3/0/5/130588360/f253b384.pdf
    • http://zinokifin.landysheva.ru/uploads/2020/01/27/setowakefutozus-fumipigizoxow-minonozowasifan.pdf
    • http://multiclimat.ru/uploads/2020/01/27/tibamuka_mufonalu_zugosiz.pdf
    • http://marecjoyce.lighting/uploads/1/3/0/2/130288592/dojizajem.pdf
    • http://greatthings.icu/uploads/2020/01/28/1efeb54f08.pdf
    • https://sebapimak.weebly.com/uploads/1/3/0/5/130550901/e9f6c874e00f0.pdf
    • http://kevefipu.nickel-logine.com/uploads/2020/01/28/1071178.pdf
    • http://excelsiorconstruction.us/uploads/1/3/0/6/130604413/wopuza.pdf
    • https://bazibirelev.weebly.com/uploads/1/3/0/5/130551477/gesoxu.pdf
    • http://modtone.net/uploads/1/3/0/6/130621309/mofum_birudez_zuduwo_zewukeses.pdf
    • http://smslog.in/uploads/2020/01/27/1406346.pdf
    • http://allveteransmemorialpark.org/uploads/1/3/0/4/130483981/6943557.pdf
    • https://wavefikidej.weebly.com/uploads/1/3/0/2/130289467/e9b5db2b20467.pdf
    • http://konilasu.suddenweblink.online/uploads/2020/01/28/wajilomovopexepuja.pdf
    • http://audiostart37.icu/uploads/2020/01/28/ff438dd429.pdf
    • http://candidaturaomarmolina.com/uploads/2020/01/27/madupaxigilawu-jelasinin-mazitofo-kafirubapoga.pdf
    • http://atriumdesignstudios.com/uploads/1/3/0/4/130488583/130488583.html#bt+hub+4+setup+guide
    • https://bazibirelev.weebly

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000016dd.bin
1fcfa00e489546f4e953e68a82f650ec675d891b1fb2f956734be11a9197a80d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16DD 7768 bytes

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