Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbddae78d08af873…

MALICIOUS

PDF

72.5 KB Created: 2021-07-02 18:28:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52e2ec3b710756e08fd8a8a38fd25cb5 SHA-1: 39b4d8792edd30a19d323715b97fe900f36449c2 SHA-256: dbddae78d08af8738dc749777d92358d2929ecc1e98bcc7ec202e7cffa669a97
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting it functions as a link farm designed to redirect users to malicious content. The presence of these links and the overall structure indicate an attempt to exploit users through deceptive means, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://cructi.ru/uplcv?utm_term=tom+and+jerry+adventure
    • https://staffxrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/a9ac13b66df79819ccf7f0381c6669c9/83265347893.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c574fcdc87b---batirakabegamutaji.pdf
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/408139bc32100cceb9c5f20b9d8f7e7b/xemexivovuvalazuzazag.pdf
    • http://lebo1977.com/clients/7/7f/7f96701a3ad848a090446b6ea7dc17b1/File/sodapumivugovaruzo.pdf
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/tae0prj971b702q6fmiudmec56/56495793379.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c2df008ce5---67305405261.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607beb13d1f74---rozifenemasalujulap.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607b126be9096---naniditiwuvefikar.pdf
    • http://www.justgiveahand.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608acc9399ab7---zolosobaxafaj.pdf
    • https://muratay.nl/userfiles/file/76520127929.pdf
    • http://clinicaveterinariabilancino.it/userfiles/files/dinok.pdf
    • https://stef-nancy.fr/upload/document/5098500046.pdf
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/2d6fe6438242cadb4c78a3026237c868/bidawexotunezosuxiza.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6a3be38b3---75903854972.pdf
    • http://etabetasurvey.com/userfiles/files/98876613158.pdf
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b07f75727d3---towukurerurabilepexo.pdf
    • http://seksdagen.nl/userfiles/file/56562119912.pdf
    • https://seerupit.dk/assens/file/bowagefiwam.pdf
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/3423a4b056392eff48e7ee6c334992f0/katapabafafo.pdf
    • http://www.rosabrockenhaus.ch/ckfinder/userfiles/files/45717650854.pdf
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/1d259a4ada62dcb5637caa9169e270d3/63872115998.pdf
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddab5138475---vebekuwiwufematuxero.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/58130971307.pdf
    • http://pphu-joanna.pl/fckpliki/file/ximelemiza.pdf
    • https://playgametoday.ru/wp-content/plugins/super-forms/uploads/php/files/c4232e7b2ee83ab96dd5925fe5a2a9d0/60081022383.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bc11.bin
d9f94dd624269db52acc3deb86f89545b98e814a832684a640633be68ad71e1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBC11 15840 bytes
font_01_sfnt_off0000e4a1.bin
7f4458026e5f4678e82b4d377c1c875570ebf3da3173ab8e6da411de05a7001d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A1 10476 bytes
font_02_sfnt_off0000fc74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC74 16792 bytes

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