Malicious PDF — malware analysis report

Static analysis result for SHA-256 2465f2f92ea589c4…

MALICIOUS

PDF

73.8 KB Created: 2021-09-11 21:14:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 0f6a996797010f719d4e8e905c443820 SHA-1: 00e99f618d4ffbc377458d5470e2323ec7e99a00 SHA-256: 2465f2f92ea589c427372f413e669bb252dcba22ef1ce81cc655a5829de7750c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. The embedded URLs, despite some being marked benign, contribute to the overall pattern of directing users to external, potentially harmful, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 5

  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/e8664e6b6d85c0580aea8f9a6ce7b03e/zozeridimewumiruka.pdf In PDF document text
    • http://kirakuramen.com/uploads/files/pederomubeke.pdfIn PDF document text
    • https://icicle-mountaineering.ltd.uk/ckfinder/userfiles/files/jajinulunedasof.pdfIn PDF document text
    • http://konditsionery-odincovo.ru/upload_picture/file/89932634898.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/dokudefunubusukadilabage.pdfIn PDF document text
    • https://stmpallet.com/ckfinder/userfiles/files/4416624998.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/61382703bdfeb.pdfIn PDF document text
    • https://perfecthospital.org/FCKeditor/file/97570671638.pdfIn PDF document text
    • http://gespk.com/userfiles/file/vuxugifujepefikolorodabe.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/23437800943.pdfIn PDF document text
    • https://kcharp.com/ckfinder/userfiles/files/zakela.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/gufamufebidego.pdfIn PDF document text
    • http://zaiger.ru/img/file/rikewapobujupivodupixa.pdfIn PDF document text
    • http://pickup-ws.com/userfiles/files/23814511380.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/niledixalulolaxiniganonuv.pdfIn PDF document text
    • http://mjacz.cz/soubory/files/kibemewelolepo.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161397164c3787---20013467294.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/tikoludula.pdfIn PDF document text
    • http://birdwatching.sk/media/file/49930059418.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=becric+betting+appPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bffc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFFC 16804 bytes
SHA-256: f3fd3356250bbbe74f16908e7f0dbf0cc069143e66fd1b37d448a4dff98a45dd
font_01_sfnt_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 10408 bytes
SHA-256: 7c03e4aadb8c081c8d9292316876aa3db900a8c089108a0f9f60049a98cb8f1f
font_02_sfnt_off0001027f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1027F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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