Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5b5e701f12dd8c9…

MALICIOUS

PDF

95.1 KB Created: 2021-08-01 08:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 894e8250d4addebc6cdea9d55f808756 SHA-1: a17ea8a941ca639eb056ad80d0d505dc7eda6a0d SHA-256: d5b5e701f12dd8c9b585907772d080904203f6ea9929127e697b278fc3905b06
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and other domains. The presence of URLs with terms like 'adobe photoshop 2020 crack dll files' suggests a lure for pirated software, a common phishing tactic. The document's structure and embedded links are designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/g4itbpo929sntnac08009r7t7t/wuxenuka.pdf In PDF document text
    • https://oklogistic.lv/upload/file/pakewabo.pdfIn PDF document text
    • http://www.urbanwaterways.info/files/16017806602.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160991fab9a584---21131113825.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/vce2btp0cfjel0g3h9p22tn92o/zifaxagaguwapebelewezub.pdfIn PDF document text
    • http://www.pzkexie.com/up_files/file/40232214875.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160bf266309848---80511855333.pdfIn PDF document text
    • https://basisangka.com/contents//files/nusesinu.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/71ada4dae7b3716facaa6f757b0c66c6/88791149469.pdfIn PDF document text
    • https://www.saenger-ohg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb59a22c926---botenowigugukoxalesazata.pdfIn PDF document text
    • https://xaydungdonggia.com/app/webroot/files/images/pages/files/gobomazofatap.pdfIn PDF document text
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dfaf1c5f537---25447875559.pdfIn PDF document text
    • http://eventcompany.org/clients/e/e3/e30ef11cf4efe639fe6592aa37b9cb94/File/sopokamozuvew.pdfIn PDF document text
    • https://directorvincentchow.com/fck_filemanager_upload/file/mupujezi.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/ernpuoo882d7uoftp3kdc403f1/febirilixagew.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160728e801b576---61759677633.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160780def14fdc---sogixebetirikufipil.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/1adeb654f10462ff108f4692a563aa06/74466428633.pdfIn PDF document text
    • http://leebyunghun.org/new/upload/board/files/53213205046.pdfIn PDF document text
    • https://harrisitalia.it/uploads/file/62734170113.pdfIn PDF document text
    • https://www.entornopublicitario.com/wp-content/plugins/super-forms/uploads/php/files/0679a5f0f8a391b0509a865269e2230d/kumapurikavuzezut.pdfIn PDF document text
    • http://cosmic-kino.ru/sadm_files/fusidujixi.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/p30kuv1j4tduqrviqaksnof04t/92143156752.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609c36d0eb54c---48380516884.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=adobe+photoshop+2020+crack+dll+files+64bit+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_off00010c9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C9A 11504 bytes
SHA-256: d8308890e9a5958c8695ff1a165411a1cf848cf12c449887f3c9fbe6d61c73eb
font_01_sfnt_off000127b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127B0 17520 bytes
SHA-256: 632157ec7ae5822d3e4364e5299aea84ee795e22fc10c82ae6ac0964e1a822fc
font_02_sfnt_off00015556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15556 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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