Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b4aa9747951cfbf…

MALICIOUS

PDF

110.0 KB Created: 2021-06-27 09:10:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f3c63dcd68c4debde80c9c41012a29dd SHA-1: 047b4e60649faccfeb972af42c4f971055a05fc1 SHA-256: 7b4aa9747951cfbf02d15e39ae10f6d047eca9646aaeb3647340e2c4b152c85f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of external URIs and link farms indicates a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://huntic.ru/uplcv?utm_term=arbitration+meaning+in+marathi PDF link annotation
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcd0c8e8d6---86943392522.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/mefenevolofawudu.pdfIn PDF document text
    • http://zuche0551.com/upload/file/xepemufalavadunumuzuvow.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/h6qmd6ju80aelgf47co0o48kue/taroturavifupikolebemon.pdfIn PDF document text
    • http://hotararicedo.ro/files/files/mexinodetaveb.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/0d209qkf3rueb8q6hvet0eua7l/xuxokuzoraro.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160738317aa39a---56084495143.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/pesiruvujelan.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/pt4huhi1a55jupav6ojprfjeko/vujogos.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/qe4d1rktannbac0gqneppfenk7/40740768147.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f3d5f9d488---joxuzekamazetotijomuxix.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/sopitatevodamejufinitiwa.pdfIn PDF document text
    • https://valserve.in/web/k/main_admin/ckfinder/userfiles/files/66058650872.pdfIn PDF document text
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9fcd00538---rexugojukexazinijopil.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a371fd733f---33050965958.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160771d7376abc---kuloxanogatakajuputeruju.pdfIn PDF document text
    • http://stphilomenaonline.org/userfiles/file/7128549796.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d55b6ae7c1---lirupisado.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/af29dc214aad3a7b7fa9443263f48751/rokizugejupu.pdfIn PDF document text
    • http://amexeuro.com/an3_Uploads/file/40384930980.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/d25470c3c409e1eef7848f8aed805683/77417536611.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/5e013de138d523e05a723785e7f4465c/27354658598.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160812c4ba6bf4---94944317021.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/xojaluvawalerivisa.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_off00014ca0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14CA0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000164b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x164B2 17912 bytes
SHA-256: 502a44edc158f6175a3117fbca67c5e3713a618343f9361616c669592000dc35
font_02_sfnt_off00019339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19339 10464 bytes
SHA-256: b54cdd9cef9727e75c18ca632a88ca93b60c9680df9068cc209702480189c5a6