Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e10da7a5f5a124e…

MALICIOUS

PDF

75.3 KB Created: 2021-09-04 07:54:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 910829e4b0714a56632d507bcb86c490 SHA-1: 0bc7a30bd304c727f95a37b5539807dd47a8445a SHA-256: 2e10da7a5f5a124e401ba203f43aa9bdb9d2ceacfa17eec4b8b375e9bc66d600
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple unknown URLs, several of which are hosted on compromised CMS upload directories. Heuristics indicate this is a phishing or malicious PDF, and ClamAV detection confirms its malicious nature. The primary attack pattern involves luring users to click on these links, likely leading to further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b9246e43a6---virobavez.pdf In PDF document text
    • https://zemiigori.com/uploads/file/4768774589.pdfIn PDF document text
    • https://aletihad-group.com/userfiles/files/99430251088.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/dijazodus.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/rezomagozalo.pdfIn PDF document text
    • http://edelstar-mos.ru/files/zigobejezoma.pdfIn PDF document text
    • https://grup-insaat.com/userfiles/file/6771999633.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/4o3ltcubom45qrg1eno9t3sda3/83674804381.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16094229214494---46152618075.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/romako.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/e8c2ae8b71124cd57b24711fe70cddac/sigesejododorefiruviri.pdfIn PDF document text
    • https://nergizleryapi.com/image/files/63350019271.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d20f6c44f91---xitoxamaboxage.pdfIn PDF document text
    • https://cmetrix.net/ckfinder/userfiles/files/34691510766.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/vegemupoxexudosugobu.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/81287766935.pdfIn PDF document text
    • https://gamepinleri.com/calisma2/files/uploads/90614757312.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ad733e3bb7---momedevelojalu.pdfIn PDF document text
    • https://abandassociates.com/ckfinder/userfiles/files/vafobetan.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/32734863154.pdfIn PDF document text
    • http://fishtech.org/uploads/userfiles/file/file/95930204620.pdfIn PDF document text
    • https://sedefartphotography.com/resimler/files/29185075320.pdfIn PDF document text
    • https://easresidence.ro/app/webroot/files/userfiles/files/donowivalazotabalunujix.pdfIn PDF document text
    • http://theorientgarden.iorderfoods.com/uploads/files/jigixexid.pdfIn PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/2c8c8c3fe7bc963aba191657d6a24910/juzufataredopunodet.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=psychosocial+assessment+tool+for+adults+pdfPDF 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_off0000c2c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2C2 11100 bytes
SHA-256: b81bea9a7c55d7187e3f9b23d5becdbcea5eb21f974a23b673440f01827bc0de
font_01_sfnt_off0000dc79.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC79 16788 bytes
SHA-256: 5d2eaab4e4dce3615768a6d92e944e5e44bb6f4c8fbbd5060cd5201d345d807a
font_02_sfnt_off00010713.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10713 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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