Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de4eebe82443d9d…

MALICIOUS

PDF

76.8 KB Created: 2021-09-02 05:22:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6a4573d38ed69ae53927692a08cdd027 SHA-1: 41ca6151a636b579e8cd05a393dadc65b18da287 SHA-256: 0de4eebe82443d9db0ab6dbf058a2cdd07f9bf0dbaeec63dd180a73f9d98c5c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm that points to numerous URLs hosted on compromised WordPress sites and disposable domains. These links are likely designed to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://ketchas.ru/uplcv?utm_term=paradise+by+the+sea+hallandale PDF link annotation
    • http://urbanconstructions.org/images/uploadedimages/file/zutasalutevisuzasinogiwow.pdfIn PDF document text
    • https://dermatologie-francophone.com/userfiles/file/94184394732.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/29e2e27cb0c94857a18a5a5bc6703731/40974615909.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/01f61988fe1ccf45a0161230fe30eb88/zetararijonobubofome.pdfIn PDF document text
    • http://electrogalicia.com/electrogalicia/recursos/archivos/jowidoremolemituvoferil.pdfIn PDF document text
    • http://ezibra.pl/upload//file/gamoxurapapupalixoxede.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/172c0cee89ed9c2565469e0050cb59f1/2523626460.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d343a42c8b598916db9414ef552b4d7/nizovesiwifoj.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/56125675931.pdfIn PDF document text
    • http://gulfcoolcontracting.com/uploads/userfiles/file/file/60374958656.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1610491b6ac0ed---wugibuzebaginipotodinosa.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/44143501650748d79433b1ee93119429/7352281039.pdfIn PDF document text
    • http://vitacanes.com/uploads/files/81637159529.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/4c72df7145a5e02320504a28d5debfe8/difomemapekuxatik.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160fe7971124a7---kituma.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/parunumebuzamedo.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a3571f6f6c6---31418669351.pdfIn PDF document text
    • http://gazosilikatnn.ru/uploads/files/42400021348.pdfIn PDF document text
    • https://soudurelauziere.ca/upload/editor/file/57845931545.pdfIn PDF document text
    • http://vhs1962.com/clients/b/b9/b967f936f519796c2a696a6ed1da67f9/File/42109881222.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/a5a9877fba271ad469f38dba9c863116/30548425124.pdfIn PDF document text
    • https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609063a4e0fd8---tapilobiwipafunorixi.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16089f0e3c73f3---wejipojerezubewalekeda.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_off0000c988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC988 16928 bytes
SHA-256: 11a5da8dfe2f2be354fd59f469accf785f17d93c8f83d659e8fa418de4c61f07
font_01_sfnt_off0000f59f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59F 10480 bytes
SHA-256: 090230aa9b257b2b75d32e72e1633e8fcbad1bb3aa9d04dc3aead0b075271a69
font_02_sfnt_off00010d58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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