Malicious PDF — malware analysis report

Static analysis result for SHA-256 2720762f5def207b…

MALICIOUS

PDF

85.7 KB Created: 2021-07-08 10:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0edd963c4ee237a696837aa5f0130d1a SHA-1: 00eb6e8c5391138b5c07d00d06dea405d4140a59 SHA-256: 2720762f5def207bb84cbfedb062b8f2d910bfc61e13d78dbd9de5f09a054aaf
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites. These links likely lead to phishing pages or further malware downloads, indicating a malicious intent to deceive or infect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://medvor.ru/uplcv?utm_term=being+selfless+in+a+relationship PDF link annotation
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf1ba6fa49---37735097011.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/25dcf8e691c42ba24ecaa1e7f9673142/fipibizotapotu.pdfIn PDF document text
    • https://awlights.com/wp-content/plugins/super-forms/uploads/php/files/7267d72a75733c08519e5f6ae6f2e177/32627431553.pdfIn PDF document text
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607adc70566c6---dubijorobuwatonof.pdfIn PDF document text
    • http://kayapaliinsaat.net/file/sitozizirigamaxud.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16081946635365---kukazamepafokidigip.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/9d5cc8db62f0a7dc6ad4a889ebb00ee7/32802297475.pdfIn PDF document text
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084d44edb14f---wijawuzalakojewazi.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae909c2548f---nexiguwakemize.pdfIn PDF document text
    • https://dineflon.com//files/76499197449.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/saribinusi.pdfIn PDF document text
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/4022370bb0d9395843dba35856865a8c/68312230971.pdfIn PDF document text
    • http://kunjipsc.com/uploads/files/ribumojeruparijabiteg.pdfIn PDF document text
    • http://wsp.pl/userfiles/file/78849241866.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ca200367f6bad374ab11d5de175c4388/28290011682.pdfIn PDF document text
    • https://tungqibiotech.com/upfiles/editor/files/91536620106.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/v37f012u9gec6d29s5igp32bib/sudasexepatatuk.pdfIn PDF document text
    • https://cgeminfos.ma/upload/file/logodovelefojudadexefa.pdfIn PDF document text
    • http://ascensionchina.com/userfiles/file/zukoxofusevefesejofesimo.pdfIn PDF document text
    • http://lubrifianti-auto.ro/files/file/70736396431.pdfIn PDF document text
    • https://dialogueinpraxis.net/files/docs/96271807896.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_off0000ed50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 10692 bytes
SHA-256: a48b1c656c4a0fcdf9e56da10c7974e46abd70560a65962a7f2d895a8fb06052
font_01_sfnt_off000105cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DDE 17396 bytes
SHA-256: 1ca01e13530f3dbeb62df917b287ff0bd8877947c9b2b3d96518af6fdbcdc5a5

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