Malicious PDF — malware analysis report

Static analysis result for SHA-256 9bfbf4eed6cb398c…

MALICIOUS

PDF

68.1 KB Created: 2021-02-28 11:02:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 5f4fed7781a1b311de9d3275ea0088b9 SHA-1: 4f383fb34d266e6fc9e88aa7b8f0d3509dbfc794 SHA-256: 9bfbf4eed6cb398cf71a0ca380f5aca23ddeef010951a018767bb70d17428901
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, with one heuristic specifically identifying a 'link farm' pattern. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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 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.
  • 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://druttle.ru/award?keyword=elder+scrolls+online+beginners+guide+2019 PDF link annotation
    • http://mozujana.22web.org/desugudowesitadinekezug.pdfIn PDF document text
    • https://jugujepatuw.weebly.com/uploads/1/3/4/9/134900825/9759995.pdfIn PDF document text
    • http://lnstagramverifiedbadge-media.com/848041998781gy5b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470389/normal_600f314ca7442.pdfIn PDF document text
    • http://helplnstagramcontact6088756.com/hamilton_beach_xl_convection_oven_with_rotisserie_reviewsodv7m.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457005/normal_5fc88a07abd84.pdfIn PDF document text
    • http://tehnikator.ru/85824922399lw6fn.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bupijila/tifajaxisanaduv.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/advantages_of_aerial_photography.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/holcim_philippines_annual_report_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/jirebonudur/beoutq_sport_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tolivajupeku/zojexotu.pdfIn PDF document text
    • http://zekarevuwo.epizy.com/87913413813.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF619 5476 bytes
SHA-256: 9d5081685691ae0811e4bd2d567c6b12d6247261c467d94c06bd442bfffff86f

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