Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0b212f9441daf9b…

MALICIOUS

PDF

75.8 KB Created: 2021-09-25 17:49:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6dd4fead935f1edb38c2c527935a6902 SHA-1: 58eaa1f6bfb3d8c80c9c5a330d342099c70139f0 SHA-256: b0b212f9441daf9b4d3666065453b7b80e21f3f1dd80c9db552e64d38fd518f7
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs pointing to external domains, suggesting it acts as a lure to redirect users to potentially harmful content. The PDF structure and the presence of external URIs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://coretry.ru/uplcv?utm_term=real+football+2012+mod+apk PDF link annotation
    • https://0a3exp.com/upfiles/editor/files/famobosez.pdfIn PDF document text
    • http://solemarservizi.it/userfiles/files/mafuloxi.pdfIn PDF document text
    • http://colorsoftexas.com/ckfinder/userfiles/uploads/15124652926.pdfIn PDF document text
    • https://citronel.com/userfiles/files/guvodefetexefezoraxow.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/56176804028.pdfIn PDF document text
    • https://ozora.schaffsen.com/contents/file/154889584.pdfIn PDF document text
    • https://vkgnassociates.com/dayafter/uploadimages/newsimages/file/ramupenelajijebagake.pdfIn PDF document text
    • http://gift-founder.com/archive/upload/files/bofejijujabolotaz.pdfIn PDF document text
    • http://dsagco.com/Upload/file/13700569493.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/66614990795.pdfIn PDF document text
    • http://asid.rw/userfiles/file/40971502791.pdfIn PDF document text
    • http://www.morrisjones.co.uk/EditorImages/file/73657096587.pdfIn PDF document text
    • http://guojingmall.com/userfiles/file///70476424867.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/jufawabivawuvivanir.pdfIn PDF document text
    • http://vititanon.com/user_img/files/18320643821.pdfIn PDF document text
    • http://bloemenwinkelindex.nl/images/uploads/26697068073.pdfIn PDF document text
    • https://mygenius.ru/admin/ckfinder/userfiles/files/99192548403.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/232127341946.pdfIn PDF document text
    • http://snabsz.ru/ckfinder/userfiles/files/23973437424.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/xekijalurevunurepilefumum.pdfIn PDF document text
    • http://applexin.com/ttpsea/files/file/79379118007.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_off0000bbf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF7 20832 bytes
SHA-256: da269c46ce80bd4d8ee23d4b5bb0cee8c4c905abb030d845a4acd582b8fb8b91
font_01_sfnt_off0000f17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF17A 10764 bytes
SHA-256: 46d41341cd3faa693e9773d3532974ae0669ce72bd33ff6556049ccde223a1a2
font_02_sfnt_off00010a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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