Malicious PDF — malware analysis report

Static analysis result for SHA-256 409ca415ebf09e3a…

MALICIOUS

PDF

90.1 KB Created: 2021-09-15 16:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d485d90248f11dbcc9cb82c2e3d6fa73 SHA-1: af8c3f81268bede5840295f3ce2917fb9401a68a SHA-256: 409ca415ebf09e3a8a5d5961777970f9fc409ef6506a064e02d04e1ba12600f0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for executing malicious code or redirecting users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/4a98fbad88b26292300e859ad9102e12/tugefuwaziwawitinek.pdf In PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/1ffe32f0bf85094d661c6e5f07b58c08/42268870094.pdfIn PDF document text
    • http://spodne-pradlo-2bpoint.sk/UserFiles/File/56748945595.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/742vg2o8brmvlbuumtgegcsvgn/zepawusojimax.pdfIn PDF document text
    • https://at-studio.tw/app/webroot/userfiles/files/20210901_110717.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/lorubosobefuta.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/riwerijijes.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/nadesot.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/zitufun.pdfIn PDF document text
    • http://pb-book.com/user_file/file/97475334324.pdfIn PDF document text
    • http://siciny.pl/userfiles/file/jaken.pdfIn PDF document text
    • http://queensparkview.com/image/upload/File/logiribulalovizugekizalis.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/kowinimadurajoxa.pdfIn PDF document text
    • https://euronuts2009.ge/files/files/17650839396.pdfIn PDF document text
    • http://wksx.top/images/userfiles/file/sotipekazamubalesoruragaj.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/fcbcfd5460161701f355d5f9649749c7/rutopefoju.pdfIn PDF document text
    • http://ladna.pl/user_images/file/77247591676.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7b828b104---zomepameses.pdfIn PDF document text
    • https://bccphil.paramedix.biz/uploadfiles/file/beluxil.pdfIn PDF document text
    • https://studiecarriere.it/uploads/file/11999036633.pdfIn PDF document text
    • http://klawiatury-foliowe.pl/_data/file/miguruxinokugefu.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/27473471758.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/98723351914.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=screen+mirror+android+phone+to+laptopPDF 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_off0000f9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9A0 10688 bytes
SHA-256: e20fc8bd0d3521a2aebf2883503fb44f7950595cf96e1df1a3f260432ed0ee83
font_01_sfnt_off000111da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000129ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129EC 18396 bytes
SHA-256: 9a10f0e6c371a896cb61bee1ca2fb35372bd391a9bb443bb8951a65af1dc9d67

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