Malicious PDF — malware analysis report

Static analysis result for SHA-256 b80de1bce75bf7fe…

MALICIOUS

PDF

86.0 KB Created: 2021-07-20 01:59:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ca550abfd9806e1162259be73c061ac8 SHA-1: d5ce3e5d7fecd51e05d7640eeb108f6c2a22faef SHA-256: b80de1bce75bf7fe5c7b9c438ea0a44049d3b27fd30dfba2306832194c37d711
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be compromised CMS uploads, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://tortugafilms.ca/adminfiles/file/8759180241.pdf
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/60efb45698b1cd8e6663da395bd0859d/senudotekajesixazip.pdf
    • https://veaodaibrahma.com/uploads/image/files/20122621213.pdf
    • http://mediaworld.pro/ckfinder/userfiles/files/50033468584.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9a3d567bd---wubivogotur.pdf
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606eee10c1110---48380247090.pdf
    • http://midel.me/userfiles/file/kumup.pdf
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e7ba386a9---rivapowopigegokokexosed.pdf
    • https://minutesnap.com/wp-content/plugins/super-forms/uploads/php/files/8f4c5a6c408d78c477d5b1ef162ee3fb/33052289401.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160776c80b478d---33431788128.pdf
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/82382310190.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/9ad2196cb9a6c504640b4e7d45b5ebf6/34800906352.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/ncoka4c8kim2fn8tv4vgv95ec1/59191674600.pdf
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/079562fb5f9bf2ee32a1868e2a00f532/dumesanogu.pdf
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rocghni7dth7cbl4de8a92t2un/30529617497.pdf
    • https://fisheaglesafaris.net/pics/user/file/budiwevubeborumak.pdf
    • http://hyeminshop.com/DATA/files/xomezajujowodipebifajaje.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcc3d64760---54714351024.pdf
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c85e8f1419f---62154197590.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160ce98fc09049---fodokanego.pdf
    • https://fultoys.com/userfiles/damijozipolefebi.pdf
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c00ba206f9b---lemegijibu.pdf
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c46b17e2d49---rakaroga.pdf
    • https://sipsib.ru/wp-content/plugins/super-forms/uploads/php/files/68a370ba19772403413143012451f466/12105581047.pdf
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/c9b859d7bd5e5328d659ad0345b9e876/33393539852.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=ways+you+can+get+pink+eye
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000efc5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFC5 16792 bytes
font_01_sfnt_off000107d7.bin
5a33daf86272d47decc7ebf8b8713018ddf7dd29bd791d90bf252fec84663596
pdf-font-stream PDF embedded font (sfnt) at offset 0x107D7 16244 bytes
font_02_sfnt_off000131dc.bin
052e1d4c691182ba9276fc09193c077c4c95b0879d4865859c03b66b093cc8f0
pdf-font-stream PDF embedded font (sfnt) at offset 0x131DC 10704 bytes