Malicious PDF — malware analysis report

Static analysis result for SHA-256 d360e9a8c32a4f9b…

MALICIOUS

PDF

80.3 KB Created: 2021-09-07 15:09:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 416bf73c52ba580e7709a22bcc979621 SHA-1: e5a4a3e26d4cb617a2db3885f70feb2f9cc41e28 SHA-256: d360e9a8c32a4f9b8801c4a0e86c753e39520201325ab0e5ca7abbeabb1d757b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to compromised CMS uploads and disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713d020fe54---mazivoxudexenumefisanes.pdf In PDF document text
    • https://usdcp.jp/user_data/userfiles/files/walaliw.pdfIn PDF document text
    • http://expnavi.com/sites/all/sites/default/files/file/gomufibowamulededurubag.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/2lbu2u3i8p4666nb5pcaa3cits/76502230555.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///61377617245.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd915772d3---46568015556.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9d23500c80---powugitotegiguvewagidu.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/medoku.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/45373281383.pdfIn PDF document text
    • http://studiogaleazzo.eu/userfiles/files/webonevi.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/5995874001.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/fl69qm4h3v2pjkk7p5ee596cd6/67179331566.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/nesinijof.pdfIn PDF document text
    • http://stasta.com/userfiles/file/38970400141.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cfac5fa46---gadinawizopejojakolu.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/97660752413.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/de3556e2870e43da9b36b7ade29a7541/50692157557.pdfIn PDF document text
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/vmec9kend8h7e3sio2m7ok1fna/69796083041.pdfIn PDF document text
    • http://emannsltd.com/userfiles/papojipezugani.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f1206e132---peremijado.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/rll11959mvhj4o75tddrjadf8b/xuxalarewolaluwoxolig.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/156e2a160c363dcb227ae9ac3ef5d5ed/wugaki.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=worksheet+preschool+transportationPDF 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_off0000d6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eedf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDF 17408 bytes
SHA-256: fd87644d03d76acc08f0e64b62f44a442a3e8e3cd5d2988f55a0c7e5ffa056c8
font_02_sfnt_off00011bcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BCD 10556 bytes
SHA-256: 993b76e8cb205e202af9164d4e956f1972c4a30082c10dd8f4ec384ce46cfee8

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