Malicious PDF — malware analysis report

Static analysis result for SHA-256 c134451539150bf9…

MALICIOUS

PDF

99.6 KB Created: 2021-06-14 11:33:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1cf533551a49e55e21b3683e5598cd76 SHA-1: 9c1504ba27c7d4e0ffecfb2c9e4da9d400156a8c SHA-256: c134451539150bf93ec81bf74bc41b4444c35a1734a2d8a61b0b24766f49a914
156 Risk Score

Malware Insights

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

This PDF document is classified as malicious, likely a phishing or trojan delivery mechanism. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting an attempt to redirect users to malicious content or download further payloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://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

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