Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0d2d3cd96e0dcf9…

MALICIOUS

PDF

69.6 KB Created: 2021-09-04 14:47:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 19e7848c7b6dc6e18c8b36ba1a78224c SHA-1: 93b2a416338956238e973510440a9b247f9e2951 SHA-256: c0d2d3cd96e0dcf9c51e1ff731a70238ef8147c3130cfd5708d0b3aec01ee6ad
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains numerous links, many pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external, potentially malicious websites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://medvor.ru/uplcv?utm_term=immunologie+pdf+gratuit PDF link annotation
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0e703d04c5---6495265567.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/54112209677.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/97124167903.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bebe5a39f41---faluru.pdfIn PDF document text
    • http://bayernglobal.de/userVZ//file/dofagi.pdfIn PDF document text
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/62ca9b1e2f1592b195ceaf473b54ae94/13460245005.pdfIn PDF document text
    • http://k9careclinic.in/ckeditor/ckfinder/userfiles/files/94846531916.pdfIn PDF document text
    • http://vivaibonomo.it/userfiles/files/mavadalunijujubugu.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/vogonulerifagijosogoke.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/66bocr2p1trb3lpl06dbvtgov7/podakiwofeza.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afee7a5b098---sibesenawagotuvujozed.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/7678c0dfaa5073b28f2fabcfef459ef2/17716580303.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/zabomufa.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608420bec56f6---lubigutudugojipefeludufuz.pdfIn PDF document text
    • http://www.tekkoo.net/images/library/File/potabemiruwiwanofoka.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/jodanatedigigiwan.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/bovibilazaduwobedeveja.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/81d254013046735605ba5d650721f028/siranefi.pdfIn PDF document text
    • http://thaide.org/userfiles/file/87795160249.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/30029983003.pdfIn PDF document text
    • http://divorcefinance.nl/uploads//file/82295256085.pdfIn PDF document text
    • http://reyazahmad.bscsaoner.in/ckfinder/userfiles/files/dorabuxemulogulunurij.pdfIn PDF document text
    • http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098344b97617---888208712.pdfIn PDF document text
    • http://biaikatolikus.hu/files/file/26993249131.pdfIn PDF document text
    • http://kasargod.net/uploads/file/soledixiwelitowage.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_off0000b3e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBFB 14936 bytes
SHA-256: 2d0048ef17267158c21324f98ddca8ed391e4b3fb916ed9dfe3bff98be9888f7
font_02_sfnt_off0000f0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DF 10724 bytes
SHA-256: 0e6579562057778692e8d4e8a3dc636f254961e76958e39ae89daf91d08820a2

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