Malicious PDF — malware analysis report

Static analysis result for SHA-256 c00c015b0c2ceb34…

MALICIOUS

PDF

138.1 KB Created: 2021-09-16 06:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: c514252621338382817030370106e7c2 SHA-1: 1f22bd95fec9e7f680b431d13535b1e442e5df48 SHA-256: c00c015b0c2ceb345cb161a4bcfe0e709ae4f79d65b5e84c702212b42a3ed830
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple potentially compromised or disposable hosting sites. While no scripts were extracted, the structure and URL patterns suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9871

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 http://theprojectmanagement.guru/cote_dor_import/admin/ckfinder/userfiles/files/38774474786.pdf In PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f731d490db---11892608281.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb8fa386ff---xetimuzepigizinapob.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/sabovujovebe.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/84212434924.pdfIn PDF document text
    • http://buzmakov-ua.ru/admin/ckfinder/userfiles/files/rezetiv.pdfIn PDF document text
    • https://renewone.de/files/92148121447.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/besuratojelixibaloduboju.pdfIn PDF document text
    • https://nazragame.com/calisma2/files/uploads/lawizuzaxitaju.pdfIn PDF document text
    • http://bright-mineral.com/uploadfile/file/2021090315051665.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/derodipiludose.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/44486544241.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613f67ca183da---44935348691.pdfIn PDF document text
    • http://contelex.it/userfiles/files/57099136248.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/381980796f824177eb774f6b1a90ca6c/84028946151.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/jisafanozutaj.pdfIn PDF document text
    • http://lighthouse-connection.at/myPix/file/60225237599.pdfIn PDF document text
    • http://tearose-kitchen.com/sites/default/files/images/imcefile/30148365686.pdfIn PDF document text
    • http://ferrocom-spb.ru/userfiles/files/bafunanoges.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/rerujetadexi.pdfIn PDF document text
    • http://ramenzoni.eu/userfiles/files/39968746777.pdfIn PDF document text
    • http://fertilityupdates.com/userfiles/files/vupidaziduzosur.pdfIn PDF document text
    • http://humansharehouse.com/userData/board/file/wedifakujiravorakej.pdfIn PDF document text
    • http://status-go.net/gfx/userfiles/files/32529829173.pdfIn PDF document text
    • http://zanethompson.com/userfiles/file/90970787414.pdfIn PDF document text
    • https://clinicamanila.com/ckfinder/userfiles/files/tanixejiguvasap.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=negative+effects+of+urbanisationPDF 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_off0001b4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B4D9 19860 bytes
SHA-256: d217af76722ee1ef724098aace9b088784ee39b3f92655b8d4061ac0cc4c298c
font_01_sfnt_off0001e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8E1 10748 bytes
SHA-256: 5fe80f3c14b461824d6c27933fbd7d7e787f6a91e3ef291bf873575380a7ff79
font_02_sfnt_off000201d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x201D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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