Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fb5d2e52fa034c7…

MALICIOUS

PDF

75.0 KB Created: 2021-03-02 15:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c39b40367786755aa638178097657bd SHA-1: f252ccc669d77c0c12edc4dd74dd64360453dc0a SHA-256: 1fb5d2e52fa034c759f8f994d233a248fb260870a6178633e6d6830c249d4010
124 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a primary focus on a link to 'soxebez.ru' disguised as vacuum cleaner instructions. This heuristic, combined with ML and ClamAV detections, strongly suggests a phishing or malware distribution attempt. The document's structure and embedded links indicate it's part of a link farm designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9800

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://soxebez.ru/award?keyword=shark+cordless+vacuum+cleaning+instructions PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420752/normal_5fce4cd3f2df7.pdfIn PDF document text
    • http://weinmvc.net/the_cosmic_conspiracybse1c.pdfIn PDF document text
    • http://save50it.info/what_is_the_canon_law_middle_ages9bccy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375209/normal_5fdd351383078.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366343/normal_5fc56f44e7ea1.pdfIn PDF document text
    • http://avtoshtorki.shop/is_the_revenant_book_goodf0i75.pdfIn PDF document text
    • http://radanews.site/backtrack_5_macyui4k.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379744/normal_5ff783662159f.pdfIn PDF document text
    • http://kamini33.ru/fifujaditetubodowuvamu4j5t1.pdfIn PDF document text
    • http://sowipilarow.mygamesonline.org/96015996654.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391920/normal_5fc6b85f44bdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388424/normal_60322e7699e51.pdfIn PDF document text
    • http://mitisavad.getenjoyment.net/84655235858.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387816/normal_602699b59d3a4.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/gurowozenupifi/83283429258.pdfIn PDF document text
    • http://vanidivab.epizy.com/97941640908.pdfIn PDF document text
    • https://s3.amazonaws.com/mokuwanibof/how_to_convert_microsoft_excel_2007_to.pdfIn PDF document text
    • https://s3.amazonaws.com/mesixadelomomo/deccan_chronicle_newspaper.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_off00010b10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B10 5580 bytes
SHA-256: 862b25ad1cb4eef3cf5b06f87912e841a952a863a4b1aba231d44909d18787e0