Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b6022401a0c6511…

MALICIOUS

PDF

88.9 KB Created: 2021-06-25 20:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 0bf44c4c5f046afa45636cb86aa2f187 SHA-1: 1d5bfa6b8ffe88c23834a36f340166d4292a76eb SHA-256: 1b6022401a0c651187b731e44dc895c24d27f83d00c985ad484754a8eaf5e485
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://catamma.ru/uplcv?utm_term=prehistoric+animals+that+are+not+dinosaurs PDF link annotation
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d35d0ed60a2.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c74f46432---45383383842.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/94728234946.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce985a957a---waroxobujaxanojutaz.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/37176384805.pdfIn PDF document text
    • http://firmykominkowe.pl/Obrazki/edytor/file/sixixarenofapibudikegogi.pdfIn PDF document text
    • https://hotellemaritime.com/hotel/upload/files/84797656519.pdfIn PDF document text
    • http://al-bandak.com/userfiles/file/wisixekupatetiwomoxusozux.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/vuworadaxuk.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/a816ca6804ff0cd77b1c8000a361e8cf/zafowolulezodi.pdfIn PDF document text
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/160887073edd7e---moriso.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/936a311a14127f1b95738742bb9005a5/bukaj.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/2ghkpjduchc9sgekdgmip9geub/mikipekez.pdfIn PDF document text
    • https://ascinfratech.com/clientprojects/trading/file/10832409019.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b40993b2107---retokubuzuraselemilebij.pdfIn PDF document text
    • https://elmaga.lt/components/com_mijoshop/opencart/image/data/files/65939122315.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/jigalubopebutepoto.pdfIn PDF document text
    • https://wkd-uk.com/wp-content/plugins/super-forms/uploads/php/files/c7963665a00254fbe626756562404126/zelinoleneravem.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160778d45e373b---99994686108.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91c36e7cab---81541403082.pdfIn PDF document text
    • https://beatmuellerfoto.ch/userfiles/files/83178258994.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609476fd2444a---dedasis.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_off0000f717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF717 10736 bytes
SHA-256: 20026e493be00c8c8801164af39ef3a3d4f375868b910a0e0507bbd75316b7f5
font_01_sfnt_off00010f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F90 17152 bytes
SHA-256: 1fb38d09141b4065a148831665338afdf6b6cc7a1c5597b85d2853aa11a8dd28
font_02_sfnt_off00013c45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C45 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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