Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe06e12eee98cd8d…

MALICIOUS

PDF

74.7 KB Created: 2021-09-16 21:48:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: a4f889365e1d14c9e4afacb4e246672c SHA-1: 4a0d3fc8105c761d2155fc41c8059772e421251b SHA-256: fe06e12eee98cd8debc3de7669bd777932efb0343bcd7b5799d3f24cb13ac8aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm designed to direct users to various PDF files hosted on potentially compromised or disposable domains. The primary URL uses a 'utm_term' parameter suggesting a search engine lure, specifically for a popular movie, to entice clicks. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://archism.ru/uplcv?utm_term=yugioh+dark+side+of+dimensions+full+movie+free+english+download PDF link annotation
    • http://dinhviht.com/images/newtech/files/nalaja.pdfIn PDF document text
    • http://luligang.com/ckfinder/userfiles/files/jugoridigepapavelex.pdfIn PDF document text
    • https://dom4m.com/userfiles/files/wanajixutanumugozudewobi.pdfIn PDF document text
    • http://kubak-ubezpieczenia.pl/userfiles/file/44499450636.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/tezob.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376689a16e4---tototaviwomab.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/91451479566.pdfIn PDF document text
    • http://geoodwierty.pl/files/file/sarize.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/59942261778.pdfIn PDF document text
    • http://webminmax.com/userfiles/file/lebofitanogu.pdfIn PDF document text
    • https://chorland-dining.com/webroot/editor-uploads/files/82067603035.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcc446fe20---23501907405.pdfIn PDF document text
    • https://www.loscam.com/lib_common/ckeditor/ckfinder/userfiles/files/bulidakawozuvejames.pdfIn PDF document text
    • http://www.dogwoodagility.nl/ckfinder/userfiles/files/22912319595.pdfIn PDF document text
    • http://9275522-travel.com/userfiles/file/mubebakaxesafimaxi.pdfIn PDF document text
    • http://www.casasemio.com.br/ckfinder/userfiles/files/53305278537.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/figenilidamojivasujaf.pdfIn PDF document text
    • http://orderkiwicafe.com/uploads/files/selujinowuvixibagoj.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/lemaxoniwozotamulax.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/4qp4tp145o5cr6ts0rbv0mmejg/bufabalobenot.pdfIn PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/38399637742.pdfIn PDF document text
    • https://seikai.jp/free_images/files/fexojanewadexowotizaz.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_off0000ba42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA42 11032 bytes
SHA-256: 7da5e555f7d58ddcb480d64215359dc3628b6b8cf1ea1af0f8ed8d0f8f47f1ac
font_01_sfnt_off0000d386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD386 19060 bytes
SHA-256: 2fd5db1a66e782b89784faf36d90b0b0cc7870f633e11c12c47abc8f2453a4f1
font_02_sfnt_off000104c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1