Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1745e0ec9072195…

MALICIOUS

PDF

89.8 KB Created: 2021-07-02 10:11:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d873de6bbe5e8e0fdc886f5769d49b48 SHA-1: 59becafed56740fc3f6fdde8c2586f9e5a132fd8 SHA-256: d1745e0ec90721951993986c1e4795437202b367754752458bd3f8eb32feda54
156 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple websites hosted on compromised WordPress installations. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware. The embedded URLs suggest a tactic to lure users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ketgate.eu/wp-content/plugins/super-forms/uploads/php/files/a8dfc39f5a5b668e2185372bfff908fd/38534808725.pdf In PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/fdaa11b36c6b04888690fbfb2437b2a1/90965000039.pdfIn PDF document text
    • https://thinkglobalcompliance.com/ckfinder/userfiles/files/matuzeva.pdfIn PDF document text
    • http://expertcomptablecourreges.fr/michel_courreges/userfiles/file/42654930647.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/13338641682.pdfIn PDF document text
    • http://daydala.com/userfiles/file/xovumilitiveluta.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/g8iipv46le7v5mf841a5vh2nsj/busalivebu.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087469c84f35---57424921222.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/nsouc3l7p15lkq8otqh9n74i1i/tibasige.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160afb7c32ca2f---xekitasopesewiwewu.pdfIn PDF document text
    • http://auldskoolrocks.com/clients/878384/File/27872790789.pdfIn PDF document text
    • https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/ae1li8o521fpb0r7vs2nmuh5hj/44189777951.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/0c67ae999acc75ccd93efb8a6cdb8c97/gokaxu.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/2712b334fbf02a5c99f72c091c4b1258/93281945156.pdfIn PDF document text
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c43e0997---nowibenola.pdfIn PDF document text
    • https://drvishweshwari.in/userfiles/file/dusanononulik.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/chsr9h3r0jauv2lej3gb68d9fe/puxasogofef.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/baf7180fdc2d25a98926438395880d65/weged.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/21ba57fdf018cb38162575775c895112/nilobasitulometevafolixi.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/prhjqatfh8pdkkps22vak161pk/karitefukijireminisol.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/30958669892.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/59c73ce0f022e17bf924b13521ddaa80/39143145531.pdfIn PDF document text
    • http://chanakyaaerospacedefence.com/userfiles/file/dokefiperovemufofes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=pet+stores+that+sell+corn+snakes+near+mePDF 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_off0000fcb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB5 10496 bytes
SHA-256: d7d481efdb49175329750095ddac99d926fa6cceee5321d4a50e1c0d30d12e0a
font_01_sfnt_off00011476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C88 17332 bytes
SHA-256: 3e9bbf1001434e64961d9c6fa02f5c59645afdb3dcd53e83bb677eaef5dba16e

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