Malicious PDF — malware analysis report

Static analysis result for SHA-256 4466addea153330f…

MALICIOUS

PDF

93.5 KB Created: 2021-09-21 04:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: aa62bdef72b64df5394e756231c14775 SHA-1: eb4cf586e8705aa0885b43b62e37c5c040362cb2 SHA-256: 4466addea153330fec025131c4ecb2c7f7acd52ffa65eaf9d1e265ec37348091
176 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of embedded URLs, many pointing to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://inks.bg/userfiles/file/lobebimusejuvosidinivogi.pdf In PDF document text
    • http://erainbowrealty.com/userfiles/file/69654786980.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c05ffa0241---75836593116.pdfIn PDF document text
    • https://winpoasia.com/ckfinder/userfiles/files/koditapitutadidokeri.pdfIn PDF document text
    • http://odessawa.com/userfiles/file/poderoxarav.pdfIn PDF document text
    • http://armanetti.com/images/36359551916.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/9761rhtpjt8inm5hqo3q6ca3ka/kevuzax.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/xomalidiwug.pdfIn PDF document text
    • https://htfcompact.com/wp-content/plugins/super-forms/uploads/php/files/09c550c72c7c03554e0527aa816e1910/4327688402.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133aabe77b22---78721429027.pdfIn PDF document text
    • http://lacasedescaraibes.fr/file/25739544534.pdfIn PDF document text
    • https://buyafranchise.org/files/files/53614268370.pdfIn PDF document text
    • https://daqing-jewelry.com/uploads/files/202109071649572876.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/xemako.pdfIn PDF document text
    • http://vrzion.com/data/userfiles/files/xemuwovufalubixukajiwiba.pdfIn PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/levuvasuvunoz.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/96241161893.pdfIn PDF document text
    • http://sirinthepgroup.com/userfiles/file/fututuzovafivowa.pdfIn PDF document text
    • http://bc-arman.kz/ckfinder/userfiles/files/75692664366.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/xaxufirizilidanirixepek.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161402985369ec---55474270846.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/37499953293.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/33007184594.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=commandos+2+hd+remaster+android+downloadPDF 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_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B64 10748 bytes
SHA-256: f2b8e4236ac8e6369dc26b21b8859e32a5ebdb213bee9bf5fa918d51e0590414
font_02_sfnt_off00013408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13408 19756 bytes
SHA-256: 31b276477fa2a0d1d4e1f43735ad388778ba4c2294da04e5caa55bcbbc4a4b44

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