Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fdbaa1bc43870c3…

MALICIOUS

PDF

78.1 KB Created: 2021-08-04 01:24:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4feafeff22a911efed87049d734be164 SHA-1: b1c43933cae17cdf7161fd44cecdce2577519b3b SHA-256: 9fdbaa1bc43870c304d9d8899d5c9dfaeef8da252dcab7d9d2b653f6b87f6b05
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. The document contains a link farm with numerous URLs pointing to potentially compromised websites or disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the overall structure indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://crewmak.ru/uplcv?utm_term=mcdougal+littell+geometry+practice+workbook+answers+pdf PDF link annotation
    • http://sevimticaret.net/userfiles/file/15358688335.pdfIn PDF document text
    • http://treeoflifetolfu.com/clients/0/07/07f122ebb3396bb3f917f2e62af81596/File/20543201408.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/99623407949.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/497ba3a4acb644a4c69b29a6a6984679/satosebimabemezed.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/c68ae9dfff5c467fe72862414e36251d/83506299501.pdfIn PDF document text
    • https://binarbaid.com/public_html/userfiles/file/duzovomadabategi.pdfIn PDF document text
    • http://abwferrellpkwy.com/uploads/files/26381953447.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/pojoxetiketigibawi.pdfIn PDF document text
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb6a051acf---93664817211.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/6po98stcinpteh092jjdv20jp8/76608959059.pdfIn PDF document text
    • https://bushregenerators.biz/userfiles/files/81982509822.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160d19d9f1fe1b---35530345311.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/kovubasiwelufidobiderodi.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/16086081c00205---1953368087.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/r7kmfr1i23so2q1tjah641cte9/18115119903.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a612cd4f825---12097972011.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/jofilipuv.pdfIn PDF document text
    • http://wadsoda.com/UserFiles/File/kusokosalopazejizitik.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/j1d5iccut1p0qog8uaef5a1362/xufewabawimojilirumen.pdfIn PDF document text
    • http://dade666.com/userfiles/202107file/2021070118530770554.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771f32e73f7---javelovada.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/8159926275.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/51708351977.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/25431941303.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/9m08gn408oeag21cttbq650j1i/ximiwibonewi.pdfIn PDF document text
    • https://mediaget.com/userfiles/files/roxudibivolin.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_off0000cbaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBAA 16884 bytes
SHA-256: 5f449446a92a6284323dffe3de965eb184f07a666e0eb264e69a5b5ddea12609
font_01_sfnt_off0000f723.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF723 11488 bytes
SHA-256: 51b73998787dca8d527a462310e648378d09b0c9c7450ca544fc1730ce977abf
font_02_sfnt_off000111fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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