Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced8e091b8181177…

MALICIOUS

PDF

89.4 KB Created: 2021-09-07 17:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 4141f2b950bc16001a6a55a44f798839 SHA-1: 43525aaca0d4cc2bcc8f6afccfe7a49f540d4a06 SHA-256: ced8e091b8181177b50e69eab4499bebd10dfb518862168194ad5e245878e886
256 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1539 Steal or Forge Credentials

This PDF document is classified as malicious and exhibits characteristics of a credential harvesting lure, specifically targeting recovery secrets or MFA codes. The document contains numerous links, many pointing to compromised WordPress uploads and disposable hosting, suggesting an attempt to distribute phishing content. While no scripts were directly extracted, the presence of embedded URLs and the nature of the lures strongly indicate a phishing attack designed to steal sensitive user information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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 http://elma-itc.ru/!upload/files/2394448648.pdf In PDF document text
    • http://artkulinaria.pl/sites/default/files/file/29529873150.pdfIn PDF document text
    • http://pericosrentcar.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160895efa713bb---26840630418.pdfIn PDF document text
    • https://hexema.com/FCKeditor/file/zufulosobe.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c778a598ec8---49550209506.pdfIn PDF document text
    • http://baruraprotidin.com/assets/ckfinder/core/connector/php/uploads/files/74058143821.pdfIn PDF document text
    • http://geofer.eu/userfiles/files/loloxakurapojelaruded.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160e0f2ffafa61---julanivijuduzuvodif.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/raxofeputokizowanasasof.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/vevomoxali.pdfIn PDF document text
    • https://dodatnagarancija.com/userfiles/file/guzesujamurejegelixasetex.pdfIn PDF document text
    • http://sial.pl/galeria/file/36433415128.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/57573375985.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/7ad084ca93c8d7fe4e01e641da42449d/fadomisudikotegomemarat.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/99613585577.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/nuvulotuso.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/9julli41f80383n5b8cfh1auv0/64998836138.pdfIn PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/cdueen6uks4k5geeov5nc1qgnt/84253877090.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/5niin4mrsvcdg3a9db77lfson7/vabidiposalilunewi.pdfIn PDF document text
    • http://mobilephleb.com/clients/2/2d/2d2188d13063160162e6e2bbcdac547d/File/53787025255.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/bipmpctj4403fisfoj1vbk4nj7/tifedexonazefogepivo.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/xuremajexoxexolaw.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/dc8ff72e72a3888b09b92c70cfb92316/69576368812.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c584643d4---34428507500.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=authentication+protocols+pdfPDF 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_off0000f63f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63F 18824 bytes
SHA-256: 30aa18ff590bd6384b7241400430a9b3b9aba656c913aadb6addd96e6658b723
font_01_sfnt_off000126e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013efa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13EFA 10800 bytes
SHA-256: c470c4d0f125128a51726674817b36337a9a1e6a5bb3249deac92a12130c676d