Malicious PDF — malware analysis report

Static analysis result for SHA-256 d50407e68c0cd113…

MALICIOUS

PDF

75.3 KB Created: 2021-09-05 13:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ef722e0e76a05a388f988fc79a23d965 SHA-1: fdcf4b0872d89fddd237930c469e5d7e21e1b360 SHA-256: d50407e68c0cd113c6d3a7ee9b333dc9f84604ed95a005e79758f06e6f9eea18
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. ClamAV and ML classifiers flagged this as a phishing trojan. The embedded JavaScript likely facilitates the redirection or payload delivery to the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/ac04b1a592f709507036442da6f05c3d/58741462997.pdf In PDF document text
    • http://best-infosystems.com/userfiles/file/56408817527.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/wafegivifugorop.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160e3712910937---vuvesewebewaseniku.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/k5qsqt3cqf7895g3vltctpq9rd/76635998099.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107c582f1e27---72331351456.pdfIn PDF document text
    • https://porterbrothersltd.com/app/webroot/uploads/vipijaro.pdfIn PDF document text
    • http://gancza.pl/userfiles/file/renukejebufozupivomex.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/82765531757.pdfIn PDF document text
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/nvc5gph93ruhnmralc3p38176g/35113975572.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/jaziwanuzatujulegubepopi.pdfIn PDF document text
    • http://caminodesantiagoenmoto.com/assets/ckfinder/core/connector/php/uploads/files/molotutemopole.pdfIn PDF document text
    • https://fleseriuassociates.ro/files/file/xokekudezitedelujaz.pdfIn PDF document text
    • https://erdemlerkoleji.com/resimler/files/gasolikuxixakibekusivew.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107b2e534b0b---15666339041.pdfIn PDF document text
    • https://mkting.com.co/wp-content/plugins/super-forms/uploads/php/files/89c227a3d9e51efcaeafbeca614079b5/46746792867.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161251498380d2---6463190445.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/08892c08da74f329f19cef1e6be380b6/52263595868.pdfIn PDF document text
    • http://accronline.com/userfiles/file/wawirovivi.pdfIn PDF document text
    • https://www.booster-p.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5f125d0050---xejavujajajuzopabi.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/lifakajiradalurem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=codependency+addiction+pdfPDF link annotation
    • https://grupo.iberia.com/js/ckfinder/userfiles/files/35052750123.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_off0000c4fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4FC 16724 bytes
SHA-256: 069e82f2a6f71bf012b78eeaa1313f11ee95b9d6687455020c4d67030a244f93
font_01_sfnt_off0000f032.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF032 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10849 10444 bytes
SHA-256: 1461dc6bf03cae94632288574244477e2ba9f376fe2b261f9034458be5a9aa88

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