Malicious PDF — malware analysis report

Static analysis result for SHA-256 f20d2d6f58642747…

MALICIOUS

PDF

76.2 KB Created: 2021-09-12 05:43:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 5bad17ac714dbbf048431888caeb073d SHA-1: 6c3af81a09dd59aff5bfff277af858031af79f98 SHA-256: f20d2d6f586427476900431fc831dab3d45b403da7aca0ff7fc89e8d16c308cb
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to potentially malicious or phishing sites, consistent with a phishing or link-farming attack pattern. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed to redirect users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://synerhu.ru/uplcv?utm_term=sort+the+court+ios PDF link annotation
    • http://yuc-fac.com/uploadfiles/20210909031015.pdfIn PDF document text
    • http://hiroshima-teishaku.com/userfiles/file/movekalepo.pdfIn PDF document text
    • http://kbinteriery.cz/userfiles/file/titemirepewarelu.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/89534745856.pdfIn PDF document text
    • http://sivam.pl/files/file/nazivaxekofomenebupofot.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/sasadelipikewaj.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/27204039813.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/71385813434.pdfIn PDF document text
    • http://morpheus-architects.com/file_media/file_image/file/maxagopaxanuzilotokipu.pdfIn PDF document text
    • https://accidentmatters.com/ckfinder/userfiles/files/36470996145.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/riwakidi.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/8448297839.pdfIn PDF document text
    • https://fishuntpesca.it/file/8216250849.pdfIn PDF document text
    • https://petpetmates.com/files/editor/file/22250810050.pdfIn PDF document text
    • http://aallergy.netlovestories.com/upload/files/93740620131.pdfIn PDF document text
    • https://hockeymro.ca/docs/file/gewebenagaserafezinir.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/99009859487.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161306f680266c---jiziguxalubikew.pdfIn PDF document text
    • http://nhatrangpalace.net/app/webroot/upload/files/28983602739.pdfIn PDF document text
    • http://invismortgagebroker.com/images/file/dejutedo.pdfIn PDF document text
    • https://peusch.lu/userfiles/files/92970386424.pdfIn PDF document text
    • https://umutisi.com/umut/upload/files/31385468782.pdfIn PDF document text
    • http://www.altrus.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16139e79a17707---gorozubotugopapawowekikax.pdfIn PDF document text
    • https://euro-m.si/web/dokumenti/file/13118288140.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_off0000c51a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC51A 18264 bytes
SHA-256: ea91e08cade304c16bb0df691d90f13d65db0923e167e694c2e3c03d33f3e8a8
font_01_sfnt_off0000f445.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF445 10192 bytes
SHA-256: 73409c141903b5a82305a189693cd7b244b2182dcea97577effbbdf98191b30d
font_02_sfnt_off00010b3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.