Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e64a955080d0e9e…

MALICIOUS

PDF

77.9 KB Created: 2021-09-22 14:11:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2bf4096c8fe946bf2ea18f697341827b SHA-1: 1342fd8ee165646e481cd2e11adb4dd76aeccf7c SHA-256: 5e64a955080d0e9e4864213da5bf55097cdf906c1f660846f877437de67b7696
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document is part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://hoanggiaphatstone.com/upload/files/xijogov.pdf In PDF document text
    • http://problemconsulting.com/img/download/files/jederefisi.pdfIn PDF document text
    • http://ifaistos.reality.gr/~triantaf/images/file/wemubirala.pdfIn PDF document text
    • https://et-auditing.com/userfiles/files/43297208082.pdfIn PDF document text
    • https://toyotaautobody.com/ckfinder/userfiles/files/xoreroze.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/40890878699.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/38570250128.pdfIn PDF document text
    • http://mueblesdepladur.es/1/userfiles/file/mumuxitisosinoruzagofi.pdfIn PDF document text
    • https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/224c93059e38fd6d538dadbb3a13d66e/95739656121.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/47379043891.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/7195922698.pdfIn PDF document text
    • https://bushregenerators.info/userfiles/files/wulijenof.pdfIn PDF document text
    • http://as-eng.biz/userfiles/file/lawidowisalafi.pdfIn PDF document text
    • https://drhuanghair.com/uploads/files/202109130902104186.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/sonupix.pdfIn PDF document text
    • https://rovetco.com/userfiles/file/15165793061.pdfIn PDF document text
    • http://peach2560.xyz/js/ckfinder/userfiles/files/dalanasinivi.pdfIn PDF document text
    • http://leinerpakgelatine.com/survey/userfiles/files/ranozovipasadog.pdfIn PDF document text
    • https://saunadlaciebie.pl/userfiles/file/2669866818.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/vikilonomafuponexas.pdfIn PDF document text
    • http://shamayachts.com/upload/file/81075420369.pdfIn PDF document text
    • https://salvatoredivilio.it/userfiles/file/susibalawowowimarebuxifum.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/sawibupanijupabiw.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161496dd6e2405---12629807189.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=j2ee+the+complete+reference+pdfPDF 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_off0000cc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC32 17724 bytes
SHA-256: e27d451778318a681cb947982dc8e1ddbafd4ce62eb1132ee2ee65e2e227ffda
font_01_sfnt_off0000f9d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9D0 10576 bytes
SHA-256: d680acc71b238c09d9271471596fdcefe961d1ee7f36bf075ac47073a5e530ad
font_02_sfnt_off000111ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111CE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1