Malicious PDF — malware analysis report

Static analysis result for SHA-256 f64e88d9bae63490…

MALICIOUS

PDF

77.1 KB Created: 2021-09-09 23:44:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: e3734386a2a9359f31b56b6cf2a2c80c SHA-1: 2cc054361178dd7a7d8b860af95243f5d0700bd3 SHA-256: f64e88d9bae63490237ebcf6ed4ba78c3834934274dde7aa11bbda75b95966aa
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting it functions as a link farm. The presence of these links indicates an attempt to direct users to potentially malicious websites, likely for phishing or malware distribution.

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://ibericadearmerias.com/file/15362905126.pdf In PDF document text
    • https://dogathermalhotel.com/resimler/files/85446369433.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161370f55a89cf---90714885749.pdfIn PDF document text
    • http://flirtproducties.nl/ckfinder/userfiles/files/99479498339.pdfIn PDF document text
    • http://tygodnikzuzlowy.pl/ckfinder/userfiles/files/26512427094.pdfIn PDF document text
    • http://helloslow.com/data/userfiles/files/334790466.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/ravegomijaju.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/jepav.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/2113239205.pdfIn PDF document text
    • http://bukharaatlanta.com/sites/default/files/file/21557910084.pdfIn PDF document text
    • http://krasneclanky.cz/uploads/52427309928.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/94803721910.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/fezakisewusofobotasur.pdfIn PDF document text
    • http://immodraft.de/images/architekten_agentur_images_/file/sivotupalimu.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/161339566bb2c4---pemovo.pdfIn PDF document text
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16130ac455fb73---jozekabeno.pdfIn PDF document text
    • http://yjccnc.com/upload/files/vodapixapojuv.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/30751993953.pdfIn PDF document text
    • http://debeleven.net/UserFiles/File/20893705952.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1613a25458fb7f---jebusopawise.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/raroju.pdfIn PDF document text
    • http://dinskayarealty.ru/media/file/furir.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/12e58adfbb5a5e3a467646274e11d4d7/40405812890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=use+keyboard+on+androidPDF 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_off0000c9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9CB 10452 bytes
SHA-256: 68895686d9f6d74ce72609e9682b18a4989b15b21ab4ae5c61548b6657e0ec51
font_01_sfnt_off0000e1a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1A2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f9b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B4 17584 bytes
SHA-256: cebdb13a789b513fb5e353ae8a9192fe65f6d9b9eb19324322716d8cc5e123f4

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