Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0537f206d270078…

MALICIOUS

PDF

89.4 KB Created: 2021-09-05 02:36:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 390d0ca99c25f94fc4e958c1ea9d8b95 SHA-1: d910b0959948fd292cbf70bc6cc9b44582ca50b0 SHA-256: d0537f206d2700784585a5dfab8ee27072711124e6ed6c522cb21333f5bb15ec
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to various websites, many of which appear to be compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicate a deliberate attempt to create a link farm, likely for SEO manipulation or to host phishing content. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://pixomot.ru/uplcv?utm_term=kh%C3%B4ng+m%E1%BB%9F+%C4%91%C6%B0%E1%BB%A3c+file+pdf+tr%C3%AAn+m%C3%A1y+t%C3%ADnh PDF link annotation
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4ba681369---71177750850.pdfIn PDF document text
    • http://muaah.ca/userfiles/files/50136270613.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a267405398---gewigemamutufilobuf.pdfIn PDF document text
    • https://www.ccs-corporation.com/ckfinder/userfiles/files/4690071273.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/bulagivofogovola.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/gnla7m79t40s9a8fapqshd9541/warojavugam.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b07c36bc10---danejapominozuzavabu.pdfIn PDF document text
    • http://learningkey.org/userfiles/95858032884.pdfIn PDF document text
    • https://oncallanatomist.org/ckfinder/userfiles/files/pamemikis.pdfIn PDF document text
    • http://ledlight-lamp.com/mingyi/images/userfiles/file/40593312404.pdfIn PDF document text
    • http://dxczx.com/ckfinder/userfiles/files/20210801_200021.pdfIn PDF document text
    • https://cottingham-group.com/cufiles/files/wiposojaweketufeja.pdfIn PDF document text
    • http://startent.ru/SITE/files/editor/file/23921313556.pdfIn PDF document text
    • https://kermiradiatoriai.lt/images/files/22929584909.pdfIn PDF document text
    • http://thoitrangvabaoho.com/Images_upload/files/46480215755.pdfIn PDF document text
    • http://novafish.it/userfiles/files/5012779597.pdfIn PDF document text
    • https://sharjahcements.com/images/bulk_images/files/sawebuwafamoroji.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/2644b3b8ab61cceeb7201de10ed05af7/felejepeka.pdfIn PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/30296519393.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16098a97fc409b---26448812186.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f631c4a722---22190392801.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/22949773256.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d507.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD507 16068 bytes
SHA-256: 6d636ebcb28a43c11a0b96216d988d0aaa25e428b847d4e039b2a2a6b6e27b6d
font_01_sfnt_off0000ea23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA23 28028 bytes
SHA-256: 7483d0bbdd5fbbdd53c8ecf8da27fb3d64424e25691123787fc6a2c74cd6bb61
font_02_sfnt_off000121a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121A5 12120 bytes
SHA-256: e4e83b3a7d33961e8aa4ee079091d07314ab55efee4c40f59389e82e10d9e304
font_03_sfnt_off00013cee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.