Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e119b65a5fcdc0a…

MALICIOUS

PDF

84.3 KB Created: 2021-09-07 02:49:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 5a76f4d4d92cdbf848a47e06b4838298 SHA-1: 282d701c8f4e6c8b84593e5c591c68e3c2a99df7 SHA-256: 7e119b65a5fcdc0aa90bdc2d32057e0051245fa43713803a98b73f4f6e0c5074
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains a link farm pointing to multiple domains, some of which are hosted on compromised CMS upload storage, suggesting an attempt to distribute malicious content or conduct phishing. The presence of embedded URLs and the nature of the heuristics indicate a likely attempt to redirect users to external, potentially harmful, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://whatproperty.ng/ckfinder/userfiles/files/91145418884.pdf In PDF document text
    • http://dentalcenterstudio.it/userfiles/files/ronewejofud.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16106d83631789---59408247777.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160b17d33a2ca2---70787153070.pdfIn PDF document text
    • http://benetalent.com/upload/files/72128750026.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/kitabejojusex.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/43224962687.pdfIn PDF document text
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff7e5a7d1b---vaxogaw.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610531fe37b0b---wakupavawuropenifunu.pdfIn PDF document text
    • http://beta-rc.com/upload/files/gosufe.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/rejoduwatowenunisu.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/gigekikugikatezagib.pdfIn PDF document text
    • http://patrickstaxi.fr/userfiles/file/52088205728.pdfIn PDF document text
    • http://bhs76reunion.com/clients/e/e7/e717e6e8e39ea4daeda922698d41f3c9/File/80489610799.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210525080239.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/55650291115.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/161035bffdc543---67722411235.pdfIn PDF document text
    • https://ropaalmayoreo.com/images/userfiles/file/jupogapowofamadide.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/h437rfpce3g5dut0lp0rflbi0v/miporosemeg.pdfIn PDF document text
    • http://studioingegneramato.com/userfiles/files/jadimomemipepisoru.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=halloween+math+worksheets+for+middle+school+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_off0000e30a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30A 10908 bytes
SHA-256: ea265432670686e1a8a58aa6b30927b541aabd55e3920184e791e5b0c2ddd218
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 18224 bytes
SHA-256: 813841acd94ddced1752a2b6d0f1705a74cf5171598674a46f7c19a97e894371
font_02_sfnt_off00012bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1