Malicious PDF — malware analysis report

Static analysis result for SHA-256 1430bbb63a749013…

MALICIOUS

PDF

88.5 KB Created: 2021-08-09 10:54:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 3318bc96bab6c224f6472b293cda3a24 SHA-1: 9e4fb090f9b4a0422964cd00899ae693c9cc3b0b SHA-256: 1430bbb63a749013b6439e9ae8e491dd511c806b674df88638c204e4183bbeb4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. The primary attack pattern involves directing users to external sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://coretry.ru/uplcv?utm_term=ejercicios+de+mecanografia+gratis+online PDF link annotation
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607432d032bce---16566116920.pdfIn PDF document text
    • http://clubesquilacoma.com/uploads/files/nowasama.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d58349350---zanuwug.pdfIn PDF document text
    • http://eptesteplelek.com/uploads/file/dogutobuvuj.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607e889e95c60---26006825077.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/004c764cdadd4d17c587ff9970718eb3/37670739009.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/iud40a9vb9j0r7e81331lkgf8f/19053627550.pdfIn PDF document text
    • https://thokhoavietnam.com/upload/files/74523379701.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16070d19970ccb---tasovagetu.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160e6126f80731---17574212012.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/74387683557.pdfIn PDF document text
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/vook6sfd5oneugsnrrea5q041g/85228573702.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/a184760aea5c4a7ffd941b257f3ae644/97631356640.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/c79467a947afaa56315afa2aa1a4ea5d/fitinosepofawunujadapo.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b0bab387a---nuvavamezugigiloxek.pdfIn PDF document text
    • http://indago-rovigo.it/userfiles/files/kuzewipope.pdfIn PDF document text
    • http://budaikepkeret.hu/uploads/file/baneneruselixetovatux.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/fdf1c20a061cd5acf80dcdd7146648f0/rimixokosapasevidew.pdfIn PDF document text
    • http://smakbyala.com/ckfinder/userfiles/files/78508895001.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/v3v0q3j0av0eg43nk13vjbu5ei/7605602363.pdfIn PDF document text
    • https://oklogistic.lv/upload/file/34267744890.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/voliperakulalajoduneke.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_off0000f3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AB 10932 bytes
SHA-256: db815bf2d740f67f341eac2fadd0046a78a9782fef713a9f0ab88c27658c6794
font_01_sfnt_off00010cb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CB9 17520 bytes
SHA-256: 38eac29c42baec47872de410eaecf96f8830a205c6b0f76d51ebc45630926d47
font_02_sfnt_off00013941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13941 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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