Malicious PDF — malware analysis report

Static analysis result for SHA-256 40495163a6012d59…

MALICIOUS

PDF

104.1 KB Created: 2021-07-20 14:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5f7c87bfabde2380e9eafc0adfde2bdd SHA-1: 6ee9e9f96125a16ce813c233504a0fb12d8e1366 SHA-256: 40495163a6012d59a932682de104712b1ad653698e93bd35feb1a8f18907c437
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, and the document body was unreadable, limiting further analysis of specific user lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9747

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://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f04731122---delotuwijaruvuse.pdf In PDF document text
    • http://sbnjl.com/userfiles/files/546800734.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb48882783---jodepujemu.pdfIn PDF document text
    • http://travelshops.pl/userfiles/file/tupetikapowavawaxut.pdfIn PDF document text
    • https://thediamangroup.com/_images/files/13452277442.pdfIn PDF document text
    • http://solarwindependence.com/ckfinder/userfiles/files/ripejanasekujugusunos.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/wumilejuxodipawaxurepa.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5051f3c18---wexape.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/29f37d70a6248ca97978cd48e1dc6021/23704336702.pdfIn PDF document text
    • https://sardavetri.it/userfiles/file/netitibon.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///tukusuropavize.pdfIn PDF document text
    • http://drsuthichai.com/userfiles/files/gowulomidemofepe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ce127f168---26314111667.pdfIn PDF document text
    • https://burragebrothers.com/demo/jolie/beta/userfiles/files/58293299425.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071ad2e6e14e---vuvijis.pdfIn PDF document text
    • http://allmedicus.com/userfiles/file/86859184487.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/6ba64cde01ec90d2eae79071a7a55a59/ponox.pdfIn PDF document text
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/2018c136e9e834e47758a51900c5522b/95657517406.pdfIn PDF document text
    • http://studiocalcinoni.com/userfiles/files/32987233980.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/54f232b0a746ded5968801c75a6cd403/livuribusidelevanedena.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/54077784644.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/rezorafuvekupi.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/5ed75ppae63nb798okmfi9c91s/suxerupomodatiw.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160984c20be1ab---16959967230.pdfIn PDF document text
    • http://farmaciafici.com/userfiles/files/608853861.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=the+meaning+of+eccentricPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015c46.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15C46 19396 bytes
SHA-256: a972557abde6d8efb0754d35da2efa73b360420df2d452e798036cf289323d35
font_00_sfnt_off0000edea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 10532 bytes
SHA-256: 5219855ee80826a365e823edae157bbe00dbf238820c15afd169786813b4b78f
font_01_sfnt_off000105b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 26908 bytes
SHA-256: d92f29d88e28894734adc07ffaa664ee06335de68eab0d611e5fe0a769ae7dd7
font_04_sfnt_off00017cc0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17CC0 5468 bytes
SHA-256: 2ca04b9265f3a21eb3320c85ec9a064592e692e38c1da1267c2c73e76f75000f

Open this report in the interactive analyzer, or submit your own file for analysis.