Malicious PDF — malware analysis report

Static analysis result for SHA-256 1115e3450442fd6d…

MALICIOUS

PDF

84.9 KB Created: 2021-06-10 23:51:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7fab41ccb23d4ffc8bd0a9f4f51740b5 SHA-1: 2610a5f343f60fa6bb0befc7c72fca49952c2ead SHA-256: 1115e3450442fd6deeafe9700d4579157f17067db3c20871dfdb326738a041b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains numerous links to external websites, many of which appear to be part of a link farm hosted on disposable or compromised domains. The document's content, though heavily obfuscated, suggests a lure related to Canadian work visas, likely intended to trick users into visiting these sites. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with phishing or scamming operations.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://laborke.ru/uplcv?utm_term=canada+work+visa+fees+for+pakistani PDF link annotation
    • http://obasekiestates.com/UserFiles/file/57914685947.pdfIn PDF document text
    • http://archerelectricsupply.com/userfiles/file/8629849544.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/3c7b389271c5d714a621c7c6bc020589/bogofakowalupozizubovopi.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/nlk666r5310plompdgckhjbq2f/winubunemovenozovosi.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/55110377716.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/8f85f328cee451487864b73f030bfe8c/64816089206.pdfIn PDF document text
    • http://boisehighclassof1965.com/clients/879780/File/nutituzapavolene.pdfIn PDF document text
    • http://bkdesign.ee/userfiles/file/tibipimozapalim.pdfIn PDF document text
    • https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/8702037585a70f6c594beeb261123f72/95135622372.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5bba6e9ab---60646882898.pdfIn PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160bc80337ced6---91620306094.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608c16290af64---9254001813.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/mojadatimerire.pdfIn PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/89ee1c6c1324c3dbdac8e16972503fa2/vipuj.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/1dcaa26eccfde9f156409511c7b3f745/46968722542.pdfIn PDF document text
    • http://stroisvias.ru/userfiles/file/7445137984.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0E 5124 bytes
SHA-256: 44288c4407cc3f43dc4d860c5f41a89a794b7ff728ee9198dc82d255c13fc723
font_01_sfnt_off000120aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120AA 11112 bytes
SHA-256: ecfb1cccb3c8be449656f57a760fdb92f5fd98afcecbe17c7f2d079a74afe88d