Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7c06daa9e278158…

MALICIOUS

PDF

89.0 KB Created: 2021-09-01 10:54:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 702f3752c194b70a23933e1c484cca47 SHA-1: 0e38fa1fc58bc58cd2675a178d03b97ac80468fb SHA-256: c7c06daa9e278158d98d66f4e7966060c25d99e7f69099ef9b8296adb6a67dd1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to potentially compromised websites and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of external URI links and link farms indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://smidgel.ru/uplcv?utm_term=meaning+of+orthopraxy PDF link annotation
    • http://vote4dannybarry.com/clients/2/2f/2f5d4f67c16906f9b09010289963de11/File/38080650096.pdfIn PDF document text
    • https://senfina.top/uploads/files/88505130305.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/28499396943.pdfIn PDF document text
    • https://qualitylightsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2e8b2a4451fc2436a2cf0fbe7e1decbf/vixisiv.pdfIn PDF document text
    • http://capriololaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10375630300.pdfIn PDF document text
    • https://www.elitelawnsolutions.co.uk/wp-content/plugins/super-forms/uploads/php/files/p1etif9hob8ajtn1gust6k97jl/63063005949.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/tudusumafagojosu.pdfIn PDF document text
    • http://asfus.net/virgsurv/userfiles/file/nejomarotejobizes.pdfIn PDF document text
    • http://signauction.net/userfiles/file/4407363332.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a9de94ed32f---32291938224.pdfIn PDF document text
    • http://lbs.ac.at/wp-content/plugins/super-forms/uploads/php/files/58dgp6kb8scdaj9na14jf5lcfr/wezusami.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077a01dbdf4b---noregoler.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759c993b0a7---wagezupobonekufi.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/dgbhnbgojr3rqumkcne2adibau/xegelefogubafujoxegi.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f50cf41028---sivexuxexiwat.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3433df0976---dofedibigopedi.pdfIn PDF document text
    • http://creptiles.dk/userfiles/file/tafevugomebukiwivedaf.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/d97f7eed6bab72d8cb5f79c27a32bb8e/27925260390.pdfIn PDF document text
    • http://cuahuyhoang.com/media/ftp/file/18147070583.pdfIn PDF document text
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/867835488.pdfIn PDF document text
    • http://vejwun.cz/images/pajuja.pdfIn PDF document text
    • http://seednseed.com/admin/fckfiles/file/limakaxolefamodusadakita.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/61795fcf558f1893858b50ad5ef8b803/wexez.pdfIn PDF document text
    • http://veganogle.es/uploads/ckfinder/files/tefosagigejeviboza.pdfIn PDF document text
    • http://tokyoracing.hu/userfiles/file/funolegilil.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_off0000ec43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC43 21612 bytes
SHA-256: f347d44860b6e8b282d19639e8582994b5891446c4a601ebef9d74a807b1bc4b
font_01_sfnt_off00012421.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12421 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C38 10632 bytes
SHA-256: 8c1d9284de72259a83d35604f3185106efc549ca5e695a4781568904ce5aa550

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