Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d16ed6dadc40e0…

MALICIOUS

PDF

84.9 KB Created: 2021-09-07 00:48:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 204736800a8a3f6c606cfe6d0164d791 SHA-1: 9f6f25415fb483dfd3596745159cbfd820bd4a98 SHA-256: d0d16ed6dadc40e0198a967f15f8f735fd84b79ad26c6a3642b5bc9c6dd13edc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://oniceh.ru/uplcv?utm_term=toppers+pizza+menu+pdf PDF link annotation
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160779721c665e---bipaxixezorufidonojoko.pdfIn PDF document text
    • https://www.masismarketing.com/wp-content/plugins/super-forms/uploads/php/files/ab0c470b25696fc406edee1e65b1f152/56952296655.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/r1m2ucptvdqva1lqik4dkgpbf3/5182127050.pdfIn PDF document text
    • http://aucoindeshalles.fr/menu/file/fawufiketipefax.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/tuwadaduwerujidoveruradun.pdfIn PDF document text
    • http://goldmustang.ru/files/files/32061349359.pdfIn PDF document text
    • http://tipsclubcr.com/campannas/file/pajozi.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/44bcf9e10148e2f96ff61f2abf046956/lolale.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/72d7920d6f509640931a8e1ba0ee48f8/bitotokogezo.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/nodaxerijagunavod.pdfIn PDF document text
    • https://kingdomdatesuae.com/userfiles/files/48882189594.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/mopeto.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16112ad9b03fc0---93270656831.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/kexamojevosejilefek.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/8de9cc528387343ec0e1db21cd2179d1/27945858760.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/mikuzefilinegagaripanata.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/xovituner.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/ebbfd0421000f474d1b589b2bdfa3d4b/xivixamoderomav.pdfIn PDF document text
    • http://minipit.com/data/files/32189708430.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/fagememajes.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/94905275556.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/00edd61a89a80025acb5896660114a76/82674992818.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/36931346572.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/80707561179.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_off0000e333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE333 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4A 10640 bytes
SHA-256: 7ce3fffced4337c859d97ac37f5a784a4d52878f8569a3c11afd4fdbd41bed24
font_02_sfnt_off0001139b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1139B 19508 bytes
SHA-256: 35eea010ab4113f0d07369a9cdf55d73970e450e616d026bb7d04ad3657b1af0