Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6a2f601a5b01c65…

MALICIOUS

PDF

144.9 KB Created: 2021-07-03 17:52:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 46b745b6a84a24d04b750b31707ea5fe SHA-1: 8b0850b309ce4aa1884d9e6c455b27da55b43b59 SHA-256: c6a2f601a5b01c6542751cb30f12fa33b22c0ba3806845295b54250c64a326fb
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress upload directories and other potentially malicious domains, suggesting it's part of a link farm designed to redirect users to malicious content. The file's structure and link farm characteristics indicate a phishing or malware distribution attempt.

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://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a72cfc65405---94688162530.pdf In PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/51024810604.pdfIn PDF document text
    • https://afra24.com/basefile/afra24/files/pofirufodilimuwi.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/71896082201.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210530010644.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48727e6b9c---742005127.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606e803eb4f58---zufuzo.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/q6a46bgpl9rmojhhihm7jnp689/26595985447.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/7qkdpp5dprgtib0662bbmo4lt2/35521281117.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/c655927de5d54f479655cc24407ec1fe/25689359943.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc28bd1283---29738585132.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/77300e585276a3840ec4fa07aa0dff96/45757139148.pdfIn PDF document text
    • https://dm288.rs/slicice/file/87593735585.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/b2f13f761f14b681ed7e197b46006b2d/42323090461.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/e6c4ff5207336367c5364ecdf68fde35/55619090774.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/wagotubamu.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a229462cad9---lozugunebewegovejusibitar.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a9546b9a5e9---10964035588.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce958ba038---tosefewokatilepu.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/fuvufenaxowezagujod.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16090d14de25f5---92815610983.pdfIn PDF document text
    • http://criminisiepartners.it/userfiles/files/nilubavixejavujij.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6963f05677---kepazidujofoxalopodifap.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160830fd732d32---96947019041.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/748b9b1a946d010904d8e9ea3e685b12/16142950231.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=structural+organisation+of+the+bodyPDF 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_off0001d4a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4A4 11184 bytes
SHA-256: 8aa756c9d79388c0e38691fc2e9c8a4f4e805558e9d32a92b90406f698bb2356
font_01_sfnt_off0001ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002069a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2069A 17980 bytes
SHA-256: b942f468888d7213d18b060cda840aaec3e01c51df291ed2e41ee8f0ecbafc71

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