Malicious PDF — malware analysis report

Static analysis result for SHA-256 72b9d2b69789b22d…

MALICIOUS

PDF

101.4 KB Created: 2021-06-14 20:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6b2d626ce14c79343d0f60f22ab4ce3d SHA-1: 7a2f9d0db6de162e567d78efac152661396ea039 SHA-256: 72b9d2b69789b22d7c388cf5d5734e9f30fda313bc4920ca5356987aedfc2e69
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://allytemp.ru/uplcv?utm_term=pokemon+dbz+team+training+cheats PDF link annotation
    • http://thanuyentea.com/ckfinder/userfiles/files/gunafimagojoziwap.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/1c89ca7e11dc20abe4e8c34e350e90c4/menumemak.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16084c7c2eae99---90657138829.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73e7d7057c---makegimuwikupajipulaj.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/1e3effdde88cfa6ad4bc5d257e63ca09/sagigo.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/mq2tpuj2us3lpg7qhan00htpgg/karalifuzuf.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094afe56797e---savobeji.pdfIn PDF document text
    • http://clubselectionvoyages.com/images/file/82989577680.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2888a433cf---pukep.pdfIn PDF document text
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16097774d3a136---rozobesemeno.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160821dae96813---48347046093.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/wulusiwepimo.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c18f80b9118---busoja.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160997423afdde---fokivujer.pdfIn PDF document text
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/c5e5187ae9c84fb0b25bb11d4ff0ade8/kudipidip.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/7e34493e5e1629865c4a53f5a4240f63/46410721683.pdfIn PDF document text
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/s19u24crvu1j31dp783ut37k25/mabamoxowosu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012ca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12CA1 5576 bytes
SHA-256: ec8261db533888ecb239d519291dadc5f9388e96253b811fb45e5d8ab1773714
font_01_sfnt_off00013f6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F6E 2188 bytes
SHA-256: 340b7d9bf4cef1933f06564a3b4bdedb18dfabf60f93382df505a47e23618af4
font_02_sfnt_off00014938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14938 11452 bytes
SHA-256: 679a7a59daa8bb0a2b2d1ba27dabdbb8d0e97db61794ac7701c035b60289735f
font_03_sfnt_off00017087.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17087 16196 bytes
SHA-256: a9049e2740f28e07ceae22d5f1e2fc0df0884d12edefc4f119790aeee9b14a88

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