Malicious PDF — malware analysis report

Static analysis result for SHA-256 32a5e9f4e86da241…

MALICIOUS

PDF

100.8 KB Created: 2021-06-14 11:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: d6c7bb415cd101b8142351317cea0bea SHA-1: 6b3ce4417a1b0cf8c1c621670bd67305c6c62b75 SHA-256: 32a5e9f4e86da241e4fe232d12e11d236908a4e496384886b936c813b3627eed
156 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://garglob.ru/uplcv?utm_term=how+to+unlock+akuma+in+street+fighter+5 PDF link annotation
    • https://accuratesearch.com/userfiles/file/9824576865.pdfIn PDF document text
    • https://northstarexecutivesearch.com/wp-content/plugins/super-forms/uploads/php/files/63e8617da83eb3065de25f6c066a88ed/noxifafekudono.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a40f5bcd450---53887262462.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/0c2c143534d7ec30bdfe530a5e8aa162/nenifezemekado.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/c41ffd182934a29ab06b51ac8916083b/78459170437.pdfIn PDF document text
    • https://audit-advisers.com/userfiles/file/1008632629.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/vutijolavusuduno.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/bavozur.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608082b7916fb---gumamimopanowewapujililup.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa3e982ee5---85964847354.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/gopaxezexerutofivi.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af2c5408faa---sanudajodatebudikavefen.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/jaxuwajateted.pdfIn PDF document text
    • https://foodvellythailand.com/upload/files/74675019131.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a2a072ebdc---jovida.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EFE 9720 bytes
SHA-256: fda6168e982e1769a067f8e54dbd1c3dbb8525f3ad7a5601ba43fe787df9b964
font_01_sfnt_off00013f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F48 5536 bytes
SHA-256: 766a352b85ca65bd2c46d142545238969667717b25e8b2ae48513746b7dba15f
font_02_sfnt_off000151ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x151FF 3652 bytes
SHA-256: fff7f5ca4b9fb50dff5e462d7571caddd7c2c79f5e3f0762de7da871a5176683
font_03_sfnt_off00016068.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16068 11044 bytes
SHA-256: 2a0d9afe4a862ddb7727a8549b4226def27cffbe064afa60d2e16ef0d17dadd6