Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a4997f3fea31fa1…

MALICIOUS

PDF

81.6 KB Created: 2021-09-22 12:48:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d35978f4581d5b8613cfcaa3c2d22640 SHA-1: 2edea32a0a066ebf58473a8334841e2a0c81706c SHA-256: 9a4997f3fea31fa1529e93ea61687783cb3ce3cc6bbc2698f98394a939a5cd0f
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs pointing to potentially malicious domains, indicating a phishing or malware distribution attempt. The PDF's structure and the presence of JavaScript suggest it is designed to exploit vulnerabilities or redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://garglob.ru/uplcv?utm_term=gloo+wall+skin+tool+app+download PDF link annotation
    • https://budgetparking.ca/admin/uploads/file/rerinagiwegasalifake.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/40330604752.pdfIn PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1614376e08f72a---11605197959.pdfIn PDF document text
    • http://slbreakingnews.com/ckfinder/userfiles/files/womitexefufebejorej.pdfIn PDF document text
    • http://ipea.kr/userData/board/file/xewape.pdfIn PDF document text
    • https://careersourcechipola.com/files/public/58208890556.pdfIn PDF document text
    • http://internet-trade.cz/UserFiles/file/biludofexapabusuja.pdfIn PDF document text
    • https://marupyara.com/fotos/userfiles/file/23664216734.pdfIn PDF document text
    • http://puzynowska-kancelaria.com/userfiles/file/60249834985.pdfIn PDF document text
    • https://partroyfuneralhome.com/partroy/assets/file/nuferanitopugiguxofaf.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/61017570595.pdfIn PDF document text
    • http://addisonplaza.abwingsmd.com/uploads/files/93538271970.pdfIn PDF document text
    • http://loscogliodifavignana.it/userfiles/files/90793136303.pdfIn PDF document text
    • http://hk-keber.de/images/file/xexogagazawanute.pdfIn PDF document text
    • https://biroestarsa.hu/uploads/file/konawemipeki.pdfIn PDF document text
    • http://sunnyten.net/userData/board/file/ritadebefasofez.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/19824884097.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/rixebuxajul.pdfIn PDF document text
    • http://www.optimizecost.com/admin/ficheros_fckedit_subidos/zotasosupemisinukaz.pdfIn PDF document text
    • http://plusk-car.com/js/upload/files/43548291681.pdfIn PDF document text
    • http://anduong-nhatthanh.com/uploads/news_file/kurosateberipenewaruta.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/50649586065.pdfIn PDF document text
    • http://tatugigo.com/ckfinder/userfiles/files/19886607555.pdfIn PDF document text
    • http://vatlieulamnha.com/media/ftp/file/soridubik.pdfIn PDF document text
    • 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_off0000da4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA4E 18152 bytes
SHA-256: 9f86fcb00e4b2bdf807dae3d4aeb82977ea6ceebce1c3b698e61069df413ec79
font_01_sfnt_off00010951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10951 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012168.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12168 10372 bytes
SHA-256: 33af8ccd7ba766dba3c51d62b7b19392ea01637184da0fa84796c224889dd935

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