Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd372173798ac83…

MALICIOUS

PDF

92.6 KB Created: 2021-07-22 02:57:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ee1accbd1806e651d2ccba9356bb7ad SHA-1: 4746ae37168f681152978b4db1172889f72b223d SHA-256: 0dd372173798ac8398cc0fb1640e9653c19f58937809ab80f76e7ac17f95b2bc
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The document body is heavily obfuscated and does not provide clear textual lures, but the presence of many external links indicates a primary goal of redirecting users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094774797adc---xolizow.pdf In PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/74vv3l8qfnc4fek2s4kg3og8r6/75644995656.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210712221359_18310287.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/78421011048.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b702b6792a3---zevapododajenekiv.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86a8c88b94---nagoxabexepegisoporoxo.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/96147546195.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a62aef1d0be---29131816925.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077df42f363f---dufuzefilubirekad.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8275530d4---43235646209.pdfIn PDF document text
    • https://damiel.eu/userfiles/file/temasupi.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a68a6253d95---48721086125.pdfIn PDF document text
    • https://spacio.hk/attachment/file/72327411116.pdfIn PDF document text
    • http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/bojuzuseridu.pdfIn PDF document text
    • http://neenah1976.com/clients/17995/File/pigugoja.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8316cf5b9---pigakupaja.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/5e58d1fa2f8c612baba64bfc3a376300/8726636865.pdfIn PDF document text
    • https://expeditions-travel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a1c26a2cd4---fodugebukuvi.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/fb2a1gafi5u4jiufkketgb3gmr/mozodexekuzuzujeri.pdfIn PDF document text
    • http://mikomisushiwc.com/uploads/files/sitetin.pdfIn PDF document text
    • http://allgeology.ru/ckfinder/userfiles/files/41071316723.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/bpr1hcebn13m01rulni8l3fd6c/rosemebu.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210601_67A2FD1C89A71294.pdfIn PDF document text
    • http://99hospitalitygroup.com/ckfinder/userfiles/files/25872752502.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/nowagigorutatut.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/4f972b1cc3639b955bb1fd5fad49a751/18547159028.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=the+lion+king+300mbPDF 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_off0000fd81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD81 10516 bytes
SHA-256: 9b9aec7a110fa8a5e679517b2a56fee0244a5e2e47301266379dd8abfbbe2648
font_01_sfnt_off0001152f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1152F 20652 bytes
SHA-256: 0f97cfe4ebe930fbd8898a3f0e6303a945b57da3be6603cba62be71695ebee9e
font_02_sfnt_off00014a23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1