Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d08779fae584f26…

MALICIOUS

PDF

85.7 KB Created: 2021-07-16 07:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e2bf56f476173bcfe5eec3f1650b05fe SHA-1: a94822826af10e1f3eee2ab61bc8b7b2fd651378 SHA-256: 8d08779fae584f2617b3e36a301fdd4f13790605f043e8f47eff2492ed7cc65b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://infrive.ru/uplcv?utm_term=receptive+aphasia+medical+definition PDF link annotation
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080fbe7f2288---12723503768.pdfIn PDF document text
    • http://esejsc.com/upload/files/fogisugamitepi.pdfIn PDF document text
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/sq4j1bquveqpch5smb5ajs0440/31680029154.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/4319239810.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06b2861d9e---numumamerapinenir.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/72888168098.pdfIn PDF document text
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767e1489531---14408817389.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/160c4536d79fd7---fonox.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/luzuvizatofepuvotinaxixu.pdfIn PDF document text
    • http://blpest.com/UserFiles/file/49369867795.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607138bf49cf0---gozawiwinaburaduper.pdfIn PDF document text
    • https://aviatroglo.fr/IMG/file/robegikijutoxaruw.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160949d94621a1---83407581364.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/69971518286.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/vizovolepabipuwepiru.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/wafebubexu.pdfIn PDF document text
    • http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff41f5771a---2913969822.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16086e1735f507---19134342935.pdfIn PDF document text
    • http://posekatzahradu.cz/files/file/76098470239.pdfIn PDF document text
    • https://mt-creativestudio.com/ckfinder/userfiles/files/xewufevamerineb.pdfIn PDF document text
    • https://telewebmarketing.com/FCKeditor/file/jipovadasezedusux.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/zusonupirupitixapikune.pdfIn PDF document text
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaffb30e7b0---35471906367.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160807753de576---dovagakopilojob.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_off0000e8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8FC 10896 bytes
SHA-256: 7a3ad04be62b72d9fa01952abd336d3e9c6c032cce6b907bdb55b75ce344a1ba
font_01_sfnt_off0001020d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011a1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A1F 17792 bytes
SHA-256: 1eb4fae61604bd3337e2bb372c893745a5c8caf05b4ca0ce49860beb04e52043

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