Malicious PDF — malware analysis report

Static analysis result for SHA-256 32994a045b90c5df…

MALICIOUS

PDF

112.3 KB Created: 2021-10-19 21:05:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5522ff7be86fe0acfb1144f88977d093 SHA-1: 3c877a79f97bbd46057cf208c934bbfd4c54aa62 SHA-256: 32994a045b90c5df423e354c3a1dd50d622e5bfc595c6bd7936e7227f9737895
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised websites or disposable hosting, suggesting a phishing or malicious redirection scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attack, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://queure.ru/uplcv?utm_term=god+of+war+3+ps2+iso+espa%C3%B1ol PDF link annotation
    • http://ajk-opakowania.eu/upload/fck/file/manikixos.pdfIn PDF document text
    • http://kalmi.ru/upfiles/files/9244580650.pdfIn PDF document text
    • https://florerialafloresta.com/ckfinder/userfiles/files/nibadexosapanawitej.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/pivuwuviwugizem.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/xisigedesefuvugurerelina.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1616af487a1564---todowomotakezegi.pdfIn PDF document text
    • https://gulfb2b.com/userfiles/file/2311381384.pdfIn PDF document text
    • http://transchem-tech.com/Uploadfiles/files/23421762323.pdfIn PDF document text
    • http://plechotice.sk/tmp/file/pufugono.pdfIn PDF document text
    • http://phutunggiahungoto.com/uploads/files/zujifawoketatalunadosinuw.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/30773302588.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/bqlnfm75s5m1upjp7l7uckkfbp/levon.pdfIn PDF document text
    • http://prttour.ca/FileData/ckfinder/files/20210903_67F88759739AC6BD.pdfIn PDF document text
    • https://rh-h1tapi-turbo.com/contents/files/28631552925.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16145df2e7ab55---jimalozugobuxibes.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/jutafakigavatenojisula.pdfIn PDF document text
    • https://castilloexterior.es/ckfinder/userfiles/files/bojozafuw.pdfIn PDF document text
    • http://arisutour.com/ckupload/files/liwujobakoraxivulubemoxok.pdfIn PDF document text
    • http://retailjewellerindiaawards.com/userfiles/file/tozoribomiwudida.pdfIn PDF document text
    • http://alatasfilms.gr/ILC/img/file/xedaxelujasopedupapowatoj.pdfIn PDF document text
    • http://gediklimakinahidrolik.com/resimler/files/wipituwepitebizefisiboku.pdfIn PDF document text
    • https://franchiseharbor.com/files/files/5322839235.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/53479978164.pdfIn 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://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_off0001508d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1508D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001689f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1689F 18116 bytes
SHA-256: 222814f4f09ba4619dc3c8ed176b9026e78ff0ce8971155b90a3bd697a00edc7
font_02_sfnt_off000197f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x197F3 10912 bytes
SHA-256: c768323f7b3f95245a93d5dea908c15661bde6840d2d639ccaab772b50da6dcc