Malicious PDF — malware analysis report

Static analysis result for SHA-256 012a46952bad6a3b…

MALICIOUS

PDF

83.7 KB Created: 2021-09-19 09:00:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 96171e17eb14aa30e092a259e139250d SHA-1: 51f5a2e72c1c1471e761eb5878a11d95c7cf3494 SHA-256: 012a46952bad6a3bbed5442163a6fadda5999389b282ce57a8d0fcdce750628f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into believing they need a password to access an archive, likely containing a malicious payload. The numerous embedded URLs, many pointing to compromised CMS uploads, further support a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16142c0ea9625c---zerub.pdf In PDF document text
    • http://inarchengineering.it/userfiles/files/gexujenetamamovujinituk.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/91c91433742917d7bc93add1283f544b/dupipoxufibuwad.pdfIn PDF document text
    • https://activsport.ro/userfiles/file/42116264372.pdfIn PDF document text
    • http://www.gdchgs.com/admin/img/files/pamusabolaperifuwilafe.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130c825cd2a3---19559314750.pdfIn PDF document text
    • http://autodilykanka.cz/cmsimple/images/file/jukupafamaz.pdfIn PDF document text
    • http://symbolfoods.com/files/file///39023467368.pdfIn PDF document text
    • http://unseretochter.ch/images/file/43109154786.pdfIn PDF document text
    • http://slesnick.net/userfiles/files/76360731603.pdfIn PDF document text
    • http://zartmobilia.com/userfiles/file/20210915202201.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/rililizogusunebomixu.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/64625751930.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/ff4c36c18a1c29a1f3e70a5504ab3e4a/pozen.pdfIn PDF document text
    • https://kolorubursztynu.kolorubursztynu.pl/web/uploads/files/93808891685.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/f5f0pa5n9ubh9cavjul2elh083/4882106957.pdfIn PDF document text
    • http://ternovykh.ru/content/file/didijemelebofurixeguwe.pdfIn PDF document text
    • http://1-cities.com/blog_images/blog_/file/vabovaxisigosiwebowivawaw.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/72361831996.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/85742561338.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+break+android+pattern+without+losing+dataPDF 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_off0000de41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE41 11080 bytes
SHA-256: 9c485ff41e4f1f2a4e88c862a33fe45f65abe4aa1a618e3b4110c7db55a28c4f
font_01_sfnt_off0000f79d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010faf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FAF 19012 bytes
SHA-256: 71d9f619632eeaab28fd7e963c22d36c69bf5da70a8fdd26e9e3a062dc08423a

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