Malicious PDF — malware analysis report

Static analysis result for SHA-256 9296ae7fe496379b…

MALICIOUS

PDF

78.9 KB Created: 2021-10-09 04:27:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 34881b9bbfc423a042c02b2b96d9895b SHA-1: d619009f5c1b1013d4e28da8a74cb20841eda604 SHA-256: 9296ae7fe496379b48782a99a6252d06381ccc7458b5c67dc0c41b84f8ca0a01
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, many of which point to potentially compromised or malicious domains, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous links on disposable hosting, further supporting this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://dreamscapes.ca/dream_scapes/userfiles/files/bekovux.pdf In PDF document text
    • http://biosafety.biz/ckfinder/userfiles/files/69920734715.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/6727548303.pdfIn PDF document text
    • http://nicolalazzarotto.com/userfiles/files/zewaxewonutunedagin.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/83693207452.pdfIn PDF document text
    • http://live-lessons.net/lcj/web/uploads/assets/file/jazutab.pdfIn PDF document text
    • http://artc-polymers.com/upload/images/files/28702626481.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/roxujomizusejozut.pdfIn PDF document text
    • http://ktcyy.com/ckfinder/userfiles/files/wowewovaterum.pdfIn PDF document text
    • http://hopkim.vn/upload/files/kuretus.pdfIn PDF document text
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/46654901472.pdfIn PDF document text
    • http://donateagift.eu/userfiles/file/nifusofipo.pdfIn PDF document text
    • http://nriloan.jctoursandtravels.in/files/96611971971.pdfIn PDF document text
    • http://snsi.jp/image/news_file/wakaluwijelawo.pdfIn PDF document text
    • http://school19-zav.ru/userfiles/file/18613182147.pdfIn PDF document text
    • https://wecareu.net/ckfinder/userfiles/files/41932461589.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/72339135843.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/43031549c2ea343281940e0c8de4a312/gilonudenubogasoguwuj.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345617b401f---piwosamelovazujupi.pdfIn PDF document text
    • https://gilboamedia.com/userfiles/file/bigozitel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=smallest+spider+in+the+worldPDF 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_off0000d1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e9bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BD 10816 bytes
SHA-256: 2354563e9f083bf6cd19342d9c52e9c219df4a507d391497111bc42f9ef3506f
font_02_sfnt_off00010276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10276 17144 bytes
SHA-256: b7b7b00eec0b287fa92e3e62c033e6757e36b7a3f76072e865bd6f5b0918defc

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