Malicious PDF — malware analysis report

Static analysis result for SHA-256 f96383069639b188…

MALICIOUS

PDF

94.4 KB Created: 2021-08-20 02:15:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5597be3edcffa817a52bd67902dc4801 SHA-1: 4a093cde21a7d8ae03b197dd41e4bdea51915d8b SHA-256: f96383069639b188bf973f002554ca37aba8d6f9ba956399d191dd275aaadd1f
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous embedded URLs that point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://chcial.ru/uplcv?utm_term=pro+football+games+on+tv+sunday PDF link annotation
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/08ced79566f9c2ccf46f1ccd9193efcd/lipobubidobamo.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/43cebf7788b87f9246097b91e6761c7c/dapolajagusuriviperesiv.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f4ee54ea68---47227802421.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/27271414994.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/28277181419.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc1fd05dbb---79345220631.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611ed57953130---dabijol.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/1397ef5167c33874216574ade06461f9/91999086120.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/3132e8ce4c6a7dd08c9796d118af77af/mopidafitarubeleru.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160947c1096b0b---wowig.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/vujamafinelipomonabuwose.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/sapovimububada.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/d4b1565ba2a0ad213796c2a2734e8ef6/42896031927.pdfIn PDF document text
    • http://asokmontridental.com/userfiles/file/68184511875.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/71090977557.pdfIn PDF document text
    • http://logtech.cz/foto/Image/file/zekawuxorapenibunu.pdfIn PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5be97e3bfa---tegupowazobepigevaxenore.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/tadiz.pdfIn PDF document text
    • http://kadh.kr/bobod/upload/file/xukufifazasibog.pdfIn PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/zovipuf.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/89473029485.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed18e505f7---totab.pdfIn PDF document text
    • http://ophirtonhotel.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16076752c9b95c---64367188553.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/ketesemajax.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_off00010ce1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000124f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124F3 16928 bytes
SHA-256: 331c922b7d1f0c6b3a553ab617e505ecc29cb834290f8e1603d6f0fd1f4c5910
font_02_sfnt_off0001510c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1510C 11024 bytes
SHA-256: 0381d718f71cad4388c7839fb5f05776c14988d75edad80d8ae885b352f2254f

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