Malicious PDF — malware analysis report

Static analysis result for SHA-256 1783c0433cc00225…

MALICIOUS

PDF

92.1 KB Created: 2021-08-28 22:58:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 914ad77995e46b92b697672d4dedd06b SHA-1: d29c8042e462d31f006937dd8326e2753d9d991d SHA-256: 1783c0433cc0022535dff7a54be5f31a43ec1c059cddc2f59e4563bc3a8fa398
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and link farm heuristics point towards an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://coretry.ru/uplcv?utm_term=syllabus+of+net+jrf+commerce+2020 PDF link annotation
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609beb7f3f048---seligisazovinujazopafe.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/gifozeb.pdfIn PDF document text
    • https://www.ebenisterie-burette.com/ckfinder/userfiles/files/65674757150.pdfIn PDF document text
    • http://songiadahoaian.com/upload/ck/files/11502028186.pdfIn PDF document text
    • http://nieruchomosci-swidnica.pl/userfiles/file/69578107720.pdfIn PDF document text
    • http://flygarfield.net/userfiles/file/zerotumowexuxet.pdfIn PDF document text
    • http://ned.ru/uploads/files/felenu.pdfIn PDF document text
    • http://chonburi33.com/userfiles/file/61582529884.pdfIn PDF document text
    • https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/649c69dff1ee052e5d77a18bc2e07068/guvagudigatenope.pdfIn PDF document text
    • http://creative-format.com/upload/editor/files/35425794780.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/1395299131.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/nonufexefufuvetikun.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/lofijes.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/osgb99fi74ui3i7hlnvloqnv61/tolurokimexumigofu.pdfIn PDF document text
    • https://ruxthai.com/ckfinder/userfiles/files/sejepikedukabivug.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/49298315067.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/mifefabovedu.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947cbfc5605---7173572511.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/mowir.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/fa4aa0a0cd9abedd0dbdf6b385a26935/jujigutofidiw.pdfIn PDF document text
    • http://wasserentkalkung.at/ckfinder/userfiles/files/dugosidojege.pdfIn PDF document text
    • http://dailygiasi.com/uploads/userfiles/file/wuxiw.pdfIn PDF document text
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/3d1dfda654359f880ed36324b0d640b3/rimasifitesotax.pdfIn PDF document text
    • https://ofertaromania.ro/ckfinder/userfiles/files/10565446352.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161251c6155d28---20773170322.pdfIn PDF document text
    • https://datawire.gr/files/files/30518652502.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_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 11208 bytes
SHA-256: 1cf81177a07a5a902f2ac9f2c4bb0d8b1f103a57a04684b621801af5fc0d7738
font_01_sfnt_off00011b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13335 18408 bytes
SHA-256: bc63fce853b410828a7cad8ab43fde7574be087f10e767b442573ee0d202cbdc

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