Malicious PDF — malware analysis report

Static analysis result for SHA-256 48dbd007f65c5e47…

MALICIOUS

PDF

80.2 KB Created: 2021-09-17 19:35:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3e365ebb7146c11da8e7e3c24efcca87 SHA-1: 0758ff014c707418c169be5a78553dd318b332a6 SHA-256: 48dbd007f65c5e472f7a1af856edbd71bdadff32a3b6681b3a113b8d5c8c766a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or redirection mechanism. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the conclusion that this document is designed to direct users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://svarovani-tig.cz/userfiles/file/dukofeguxepovozowibakob.pdf In PDF document text
    • http://tao-ssct.org/data/upload/file/meriworebosavulozolo.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/75f044af1e98245e57c1076591507637/gujukuverilakadub.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613019bbb8eff---vusesopogamevexupeni.pdfIn PDF document text
    • http://foodzipo.com/uploads/userfiles/files/4997257478.pdfIn PDF document text
    • http://le-nora.com/userfiles/file/95504284825.pdfIn PDF document text
    • http://demenagements-remond.fr/userfiles/file/20210913021648.pdfIn PDF document text
    • http://spartaksedlec.cz/spartaksedlec/userfiles/file/89192174180.pdfIn PDF document text
    • http://mexxeopaint.com/upload/files/melojivateti.pdfIn PDF document text
    • http://maturitni-ples.eu/UserFiles/File/56431022217.pdfIn PDF document text
    • https://vanchuyenduongsat.vn/upload/files/maturelutajozonolerak.pdfIn PDF document text
    • https://www.spitalmoldovanoua.ro/ckfinder/userfiles/files/pitivofigazanokive.pdfIn PDF document text
    • http://gdgom.com/upload/file/2109011749421700282rrjln87gpng.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/11460794147.pdfIn PDF document text
    • http://md-servicios.com/userfiles/file/modimemuradukaz.pdfIn PDF document text
    • http://wcsps.com.tw/ckfinder/userfiles/files/nitemosefilapilowufopes.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/tefukebisowuwinudeku.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/komevasinewomuveku.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/wezuvirijisukogijebi.pdfIn PDF document text
    • http://sallytour.com/FileData/ckfinder/files/20210912_BC201806FDB1F5E4.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/27510093058.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=jarvis+intelligent+pro+apkPDF 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_off0000d27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 10576 bytes
SHA-256: 6afa8093d7e538782b5aa57ea67f889c06793f705813de7b24b40db9242cc6a7
font_02_sfnt_off000102da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102DA 18676 bytes
SHA-256: 638540ea5eaecb9b5d80185acfcb848d56548fb575318d74ee6eed5690d88032

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