Malicious PDF — malware analysis report

Static analysis result for SHA-256 25be5ee0cbbbd950…

MALICIOUS

PDF

147.2 KB Created: 2021-07-03 01:05:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 9d5eaf6787e674b9d67b3e8945625077 SHA-1: 322ddd66ed71ae4ee1157a885b44876e53f63ea1 SHA-256: 25be5ee0cbbbd950900972acb5214bd6834f853c40e666c29fc31060b682aa2a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to compromised WordPress upload directories, suggesting an attempt to redirect users to malicious content. The PDF's structure and embedded links indicate a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607279bcf28d3---14108328332.pdf In PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160784eeac702b---67370209966.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/a67607aecf77b33a11d5e033c214e7b7/74548198507.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16077438ded7e5---tadazubavu.pdfIn PDF document text
    • https://creativenursery.net/home/creative/public_html/ckfinder/userfiles/files/nijolekijodefamuwixiwu.pdfIn PDF document text
    • http://ylplj.com/ckfinder/userfiles/files/50827857401.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085bfa590dad---40749389629.pdfIn PDF document text
    • https://noddy.nu/images/file/67824723126.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/18agj6103qduob3p7kf64j0127/xatasozenutavilafo.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/eoiidf99p31a940s8emn9rjgdv/givotikotu.pdfIn PDF document text
    • http://myappartement.de/web/editor/files/55185189229.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/2684646443.pdfIn PDF document text
    • https://yellowstonewildlife.com/tefekopuvetixuv.pdfIn PDF document text
    • http://thehonourride.ca/clients/c/c2/c2a221447f3e921143a55eca482c8289/File/82996777255.pdfIn PDF document text
    • http://imcborivali.org/userfiles/file/ximibefinavimikuweduxuk.pdfIn PDF document text
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/p2caes6rnr30mrkl5nd0uvllui/nusaxo.pdfIn PDF document text
    • http://morethancars.nl/uploads/edytor/file/voxidajizefima.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b8d291396c---95084119760.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/59995671103.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/41hhp3f2m5745ei8mpli6gce5v/17668640062.pdfIn PDF document text
    • https://comfortinnbarrie.com/phpsites/vertical_living/uploads/file/59869472350.pdfIn PDF document text
    • http://ttccid.com/userfiles/file/91370231089.pdfIn PDF document text
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/at8leu8re7p4qv14bmb3m8qcc2/namafesolivesopewip.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b83d5b4b85f---47900030900.pdfIn PDF document text
    • http://nutrisoilvietnam.com/upload/files/89794860432.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=what+is+a+paradigmPDF 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_off0001e180.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E180 17948 bytes
SHA-256: 225ec3b5c95204f088b30041f2c0d181ccd837090173f7526bb08f7e18567c4e
font_01_sfnt_off00021027.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21027 10428 bytes
SHA-256: 5b37f5efd99b5c89c27aca66b5e21789a9611e3fa5d26f1735ce7ae912d7731a
font_02_sfnt_off00022795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22795 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1