Malicious PDF — malware analysis report

Static analysis result for SHA-256 2939b3cf101beb79…

MALICIOUS

PDF

93.1 KB Created: 2021-07-18 11:37:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: e84a6ae4f0118f70cc3366a0f23f2116 SHA-1: f4a4c47f46929d200690f146102aea3e61df29a7 SHA-256: 2939b3cf101beb79cef49ac329df3881853ed00287f30544c3306254bd339810
204 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. The 'ClickFix' heuristic indicates it's designed to trick users into running commands, likely to download and execute a second-stage payload. Embedded JavaScript and numerous links to potentially compromised WordPress sites suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://beautifullifeuk.com/wp-content/plugins/super-forms/uploads/php/files/420feb1dcb73a2956affe72a6a90b4fd/45511962491.pdf In PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d049d4316---27266303469.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/bdef7878c370d582120dc3a29d2ec97f/58931603636.pdfIn PDF document text
    • https://www.hausbootgeiseltalsee.de/wp-content/plugins/super-forms/uploads/php/files/n4hurojlhmrlht22sam6v8ehu4/pawilaxopirasamawukuzuva.pdfIn PDF document text
    • http://www.lugashotel.com/data/editorfile/venipisokadit.pdfIn PDF document text
    • http://musiconthebay.org/clients/2/26/269dd5bc96e197da989a8dccc71442af/File/lanavarupudu.pdfIn PDF document text
    • http://somersetcountybar.org/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87736722087.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16083e36fe7262---gokizutobut.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/e5dc29cf586b683a28813fe5473ba883/tekewukumirata.pdfIn PDF document text
    • http://elcampoeco.org/FCKeditor/file/jaxoko.pdfIn PDF document text
    • https://afayl.com/userfiles/file/xubawok.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b55fb37c5e4---kejiposavo.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a9fc01b3391---kovelisibobewonalexelan.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/d79d7992c3ab631c9c0987e9b3c1ecde/barepasulisot.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607532e3c482e---28932014662.pdfIn PDF document text
    • http://musclecar-taps.com/js/upload/files/45209444630.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/77531339519.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/fajivorafevidaruta.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16082c83288a31---27893120663.pdfIn PDF document text
    • http://ownlines.com/upfiles/file/rorubipimovutotazivinap.pdfIn PDF document text
    • http://bradhelferlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/livegukerutopirufizan.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/834a3106abb7815e54c398a52d57a840/84921486139.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084137ccc4b8.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aad407a57ab---44225090611.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/57fd3bf422b13aa14143e79d7d27db0c/dodama.pdfIn PDF document text
    • https://miamivanservice.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a345830041d---potogerutanatabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=make+your+minecraft+server+freePDF 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_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 17140 bytes
SHA-256: 4ed963aac4d349cc83e96d041ae66d8139c09f060beda4f449f9e621fda80400
font_01_sfnt_off000135da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135DA 10816 bytes
SHA-256: 14abbcb3901525cfc3945e41fc55b820b6b8104039ae19a3914fac33ea042015
font_02_sfnt_off00014ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1