Malicious PDF — malware analysis report

Static analysis result for SHA-256 b440d4448379132b…

MALICIOUS

PDF

83.9 KB Created: 2021-08-17 16:38:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 193b94a62443a55fcee0f7fe481fb0b8 SHA-1: cd19dd84ee8ff20af80e11c58cc6573f6160e6a7 SHA-256: b440d4448379132bd9cfef5c8f440e198701a1d6427b3123e4db7adf4047ea4e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or conduct phishing. No scripts were extracted, but the presence of numerous external links indicates a likely intent to redirect the user to malicious or compromised web pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://forex-robo.org/wp-content/plugins/super-forms/uploads/php/files/115383cd8255dcf6bf9e8f3b2677043f/40736562540.pdf In PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/eib7rg242oknk26ad3kmdtva2v/penimojixaxonuvijakafog.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/dowoz.pdfIn PDF document text
    • https://goodline.by/userfiles/file/kokewumuvewem.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a45fc147908---jilatajukodemegi.pdfIn PDF document text
    • http://maduraigarlandshop.com/userfiles/file/kakejuguliberesoza.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075b43cb2485---28280916073.pdfIn PDF document text
    • https://steammining.com/userfiles/file/rogej.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077dbda04716---welupuwijuguf.pdfIn PDF document text
    • https://athensviptour.com/wp-content/plugins/super-forms/uploads/php/files/9e5ea6b9caadb8f99451ec5f37d8e1f8/50972428917.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/c29edb178d6c8d4e88d1049062d4fd0e/kegugumepotu.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c57294aad5c---fanunezi.pdfIn PDF document text
    • https://kemxoi.vn/app/webroot/files/images/pages/files/88236924245.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b805f286e8---pixalakusuxolukisazubivu.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/57302045565.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/48711088953.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608832c6eaed7---bevawirevun.pdfIn PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/5f0f93497545951011b06aaeed5af27a/25024896282.pdfIn PDF document text
    • https://hgb.se/filer/file/92198556544.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/48938754349.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/49891477efe96c0b5c6beda9c6638325/pabob.pdfIn PDF document text
    • http://www.nena-artspace.com/ckfinder/userfiles/files/xogumijot.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/835a0c4dcd2889bf5bc2de47dabbf766/soniwamenetujibeluxu.pdfIn PDF document text
    • https://aspirans.com/files/file/13660765317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=how+to+turn+off+porsche+macanPDF 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_off0000e394.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE394 17320 bytes
SHA-256: 4300cf2d1797258e3db3a87f45e77f2d9edc0a7ffda417c391ee9c4101176ed5
font_01_sfnt_off000110e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E8 10784 bytes
SHA-256: 526e36471d76585b779990e5a4ccf4996232c00a2a992542b02a60d248eba101
font_02_sfnt_off000129a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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