Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de2915dc48f53ed…

MALICIOUS

PDF

71.8 KB Created: 2021-09-07 00:19:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: add8cf6ad1bc5bb028192c68a4bbb9d1 SHA-1: 0d63d9704aac32bee8a09dbeb2c4d37610414ec8 SHA-256: 0de2915dc48f53ed85eadf1a669a4d5aceca998ad585e1a6a2f37540d59b733e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised websites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. The embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://laborke.ru/uplcv?utm_term=terapia+de+memoria+celular+pdf PDF link annotation
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609842111b97e---26096987855.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/fboomtjpajueb5idsmi0cto2a7/luvuwonogozabatu.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/boxaxa.pdfIn PDF document text
    • https://specialbrands.gr/wp-content/plugins/super-forms/uploads/php/files/7050e2575a2ee869ce3781a3407bed39/23587478173.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/b5e87ee6109c61b58a02c62bc967f62d/jitozav.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae37585def---99646719780.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/h7hvt9uin01i56hpsd5dkqh0ti/nojakagof.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/27890169676.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/88290719042.pdfIn PDF document text
    • https://trvstore.com/userfiles/file/26943236807.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aed07219341---kufuzawuzemufo.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/78962385871.pdfIn PDF document text
    • http://wang023spa.com/userfiles/202107file/2021070912021570554.pdfIn PDF document text
    • http://www.sictombbi.fr/ckfinder/userfiles/files/jekuretuviki.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607651d99bf1d---moboguvavagakori.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/rikumemitalizegopeludot.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/329f9fec59f929589e6c8c07cac7f51f/lonugevazewazenivuzezozig.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/poxesuvubajikulakoketixen.pdfIn PDF document text
    • http://vervesimuhub.com/userfiles/file/mitatasewusuwivamimup.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/30116619332.pdfIn PDF document text
    • http://antansconstructions.com/ckfinder/userfiles/files/bodudur.pdfIn PDF document text
    • http://nhatrangpalace.vn/app/webroot/upload/files/maresozibiponiba.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_off0000b635.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB635 10472 bytes
SHA-256: eb1fe0685afc94efc9033a4a90a1cb9ccefbce0a2956973a950abb1ca5c7859b
font_01_sfnt_off0000cdeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDEB 16912 bytes
SHA-256: 2242d07d4d7352179f63b0f95aef7c451bc684447a98c4a9ac4de545e2d6c3e1
font_02_sfnt_off0000f84c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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