Malicious PDF — malware analysis report

Static analysis result for SHA-256 186f0376d41f4049…

MALICIOUS

PDF

84.9 KB Created: 2021-09-12 22:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 19b2386ac09cbdc7f2288862c8a64b27 SHA-1: bae890248952248d85904b2a89a4a0e1333cb21d SHA-256: 186f0376d41f40492da4dd7db81433b970d35b5fba058ae0a470f841a786ec9d
236 Risk Score

Malware Insights

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

This PDF document is identified as a phishing lure, impersonating Netflix to trick users into clicking a link that leads to credential harvesting. The document contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a broad phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely involving JavaScript for redirection or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://medvor.ru/uplcv?utm_term=view+saved+passwords+chrome+android+apps.
  • 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=view+saved+passwords+chrome+android+apps PDF link annotation
    • https://adurucui.com/ckfinder/files/pedoron.pdfIn PDF document text
    • http://rayanchem.com/d/files/sogowamofafevipo.pdfIn PDF document text
    • http://sola-brothers.com/userfiles/file/wuvez.pdfIn PDF document text
    • https://willmarareachamber.com/ckfinder/userfiles/files/kisawovudimo.pdfIn PDF document text
    • https://honghow.com/ckfinder/userfiles/files/86242259744.pdfIn PDF document text
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302dee5b63d---tavuguwovikaviroperuxepik.pdfIn PDF document text
    • https://birutelorasin.com/contents/files/30469073856.pdfIn PDF document text
    • http://asorokolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/sefaxenibedebirisudetomub.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16138154f66a25---sutozibabebebak.pdfIn PDF document text
    • http://kiapelhrimov.cz/UserFiles/File/jawilaf.pdfIn PDF document text
    • http://hrudolf.com/userfiles/jenilozepifixuvumegop.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/30350949750.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/30425218036.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/99949550686.pdfIn PDF document text
    • http://meetburgerusa.com/uploads/files/36210495884.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/li52edisn480kcl2q340aoa809/wuxufikile.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/25872165456.pdfIn PDF document text
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613161a707bd8---17259538077.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/161387224e6800---mugivugusizapi.pdfIn PDF document text
    • http://trufeel.com/ckeditor/ckfinder/uploadfile/files/56619847146.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/18031593689.pdfIn PDF document text
    • https://cheesykeju.com/contents/files/nasiterudefufibebebaxe.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/74090253286.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_off0000e8f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F6 10756 bytes
SHA-256: 1cbcc9a6c887d72104a0b1d9aff9ce87ce5e481bec59e42d263209e928f5d006
font_01_sfnt_off0001018e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1018E 17028 bytes
SHA-256: 2129b1e03547dd6d6e1140b6cbff25fd26fce6667d234747732f198b559c55af
font_02_sfnt_off00012db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12DB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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