Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2215e4650aa850a…

MALICIOUS

PDF

72.5 KB Created: 2021-09-19 13:16:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 893cdf271acdcfb75a10ce9b7c01e266 SHA-1: 894849f29b2e0624ae80fdbce6cdbce0ae163bab SHA-256: f2215e4650aa850ac3e53022713d5a22693a324abbd49d99e3b2f132a7e07233
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous external links, many pointing to unknown domains, and is flagged as a link farm. While no scripts were explicitly extracted, the PDF structure and link farm heuristic suggest it's designed to redirect users to potentially malicious sites, possibly for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://zgic.ru/!upload/files/duboxilipefalupajezusure.pdf In PDF document text
    • http://prplus4u.com/ckupload/files/29842643025.pdfIn PDF document text
    • http://aokunoil.com/ckfinder/userfiles/files/85136740690.pdfIn PDF document text
    • http://ecilingirler.com/resimler/files/ronebakeradododajale.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/64116620302.pdfIn PDF document text
    • http://cathyknightwaite.com/ckfinder/userfiles/files/13442086630.pdfIn PDF document text
    • http://ekstelekom.com/userfiles/file/18661451660.pdfIn PDF document text
    • http://hertzlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/davume.pdfIn PDF document text
    • http://www.focitabor.hu/userfiles/file/vizerulexoloriluwa.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/puzogipobow.pdfIn PDF document text
    • http://ellissi.org/userfiles/files/62118064574.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/16138f193c12b2---90353271616.pdfIn PDF document text
    • http://surestegc.org/documentos/file/28145080400.pdfIn PDF document text
    • http://residencelesaline.it/userfiles/files/18508356637.pdfIn PDF document text
    • http://eskuvotoszkanaban.hu/editor_up/87266738450.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/dunidapigodukavunizek.pdfIn PDF document text
    • https://cmfnepal.org/userfiles/files/wusuwepuzuvipevigefen.pdfIn PDF document text
    • http://fuerst-architects.com/uploads/file/30050414578.pdfIn PDF document text
    • https://allora-tour.by/var/upload/file/kirisebalekojadiberab.pdfIn PDF document text
    • http://wmsone.com/eimages/file/penowuvu.pdfIn PDF document text
    • https://moveo-sport.pl/userfiles/file/5201016173.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/lowuve.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=apps+like+mobdro+for+sportPDF 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_off0000b8db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DB 16776 bytes
SHA-256: d72f1d53343871cc163f04fdbf5036bc9d48ae3e8dc5d57406a88ffebeb76c81
font_01_sfnt_off0000e431.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE431 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC48 10608 bytes
SHA-256: 97f95c20505bab8b2d7e5dc90d5e0b8004324844394486ddd93af93ab7a2b0cc

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