Malicious PDF — malware analysis report

Static analysis result for SHA-256 55bc967e792f30ce…

MALICIOUS

PDF

78.3 KB Created: 2021-07-07 20:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 829ede599e31fde5122b0d91fa142b9e SHA-1: 51b2d539396b4d94ed1e8b07239d4fc5b44a22e4 SHA-256: 55bc967e792f30ce7669e6f111b45b46cbd1ef00e3c1650dbdf246d87e5f0e03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9958

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://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/1609dfc3513126---vonilavodisi.pdf In PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e590efbb3---gakeginosuvufawosatuli.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/bbf39b4a61b782d5c1e1d10c4cda932b/5993812398.pdfIn PDF document text
    • http://hanleyresources.com/images/3003428917.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099f8a359281---diliwolibupatawojexu.pdfIn PDF document text
    • https://dienlanhbachkhoa.info/upload/files/vepimugufifurukavipoxoza.pdfIn PDF document text
    • http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd05a349d6---mimipeku.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d01ec499b0e---domupup.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/sudimeda.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/kakipomariraneneni.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/laloxexuvanenilenorug.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/ekodcff5m0vm48mtf41dl1g01s/dalojuxidomijupexasovet.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/52305163450.pdfIn PDF document text
    • https://ilmercatinosottocasa.com/file/28046713508.pdfIn PDF document text
    • https://its-bulgaria.bg/files/file/13947393860.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/24255157668.pdfIn PDF document text
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/bfecc2df953cb37339421e4618ba3dd1/48944656471.pdfIn PDF document text
    • http://lempreintedubois.fr/userfiles/lempreintedubois.fr/file/gumujuzugalefofuzugifo.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cbe79c98fc---bajori.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b486b961497---pewasegovufolasukez.pdfIn PDF document text
    • http://teplospectr.ru/images/files/56605948213.pdfIn PDF document text
    • http://fittbike.hu/files/file/98537079998.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/iaj582kkl48tnf2ovka0h4hgbm/12388013983.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+simpsons+and+philosophy+pdfPDF link annotation
    • 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_off0000d00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00B 17044 bytes
SHA-256: d46ed090127b399926ab2e459bef7ab274a3954b7b12e8f5e282c07aeae8008f
font_01_sfnt_off0000fbec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBEC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011403.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11403 10644 bytes
SHA-256: 39c6b6c70e6d80ce6dca97774cdcc8d0653157202e8c2f154e4d45481c507c1b

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