Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ee2b7d67ff4b1c6…

MALICIOUS

PDF

75.0 KB Created: 2021-07-04 16:06:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1aeb91bd07c0fc520fd8ae45cca9270e SHA-1: ed439a313411386b6468efbb6984b79d994651b6 SHA-256: 7ee2b7d67ff4b1c61713bf5fc4dfe5b0390b9d91f8cefc2225d58580d0d42a97
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate high maliciousness. It contains numerous links to compromised WordPress upload storage and disposable hosting sites, suggesting a link farm designed to redirect users. The PDF structure and link farm indicate a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://www.colours-of.com/wp-content/plugins/super-forms/uploads/php/files/goqhomag4a54bcuvqn7csf2lc8/92009344344.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084ae8f225ad---ginilab.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/160c126945110a---vewonaxixifode.pdf
    • http://qytbearing.com/upfile/file/10419262428.pdf
    • http://herculesestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/boxikajibirani.pdf
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609ebadaca6cb---rokejaduzizejowedok.pdf
    • http://oreade-breche.fr/userfiles/file/60482892087.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/86d624a97231383aa2d9c28bbbbbe614/dimanenufunigatudafurizu.pdf
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b18ef4cdb3b---midusizobawu.pdf
    • https://sckstone.com/wp-content/plugins/super-forms/uploads/php/files/ebd25102b5a7d18978deb2d2780701a6/28596088928.pdf
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/vveuj4am3qpdntf73u1gmcareu/mojota.pdf
    • http://banhangcongnghe.com/upload/FCK/file/3598345983.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/nina838u30dnn6qciok2ioo09k/21501402008.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb49955eae---bidusutarumapupi.pdf
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/99359840821a929f13e027836092004a/kegisotuluxene.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=dupage+circuit+court+forms
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c11b.bin
4b23209395a2b0106b9366d07a00ae426e830dd4d84a6d653a1a90e058086f96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC11B 17436 bytes
font_01_sfnt_off0000eede.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDE 16792 bytes
font_02_sfnt_off000106f5.bin
85e2690bc157ced22372950122d5f17de5ae2f286a97ea07edb88fb6a996f09f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 10776 bytes

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