Malicious PDF — malware analysis report

Static analysis result for SHA-256 8bdaa54a1e7e040e…

MALICIOUS

PDF

84.2 KB Created: 2021-09-18 08:33:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 79e1fd4bff3daba176806b2001efb0a1 SHA-1: 3e0ced01b73fd99a2529ab1c5106969c6ba1e3c5 SHA-256: 8bdaa54a1e7e040eb4264ab2f0650fd56403052662e6b686e680b1eb6f878939
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the structure and URL findings are sufficient to infer a malicious workflow.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=movies+website+telugu PDF link annotation
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/dfcb74b8a466e33f1b8f697f178a7506/95353139475.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/57062569030.pdfIn PDF document text
    • https://siahotel.com/userfiles/files/39965481530.pdfIn PDF document text
    • https://primax.fr/wp-content/plugins/super-forms/uploads/php/files/8l0ff7mi0cdvkehkbq9gqlb4s3/29391768369.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/2c1cb8422a3ba6d0704f3b77765130ad/23922737455.pdfIn PDF document text
    • http://ordineveterinarireggioemilia.it/userfiles/files/17317898541.pdfIn PDF document text
    • http://leicesterbiketec.com/userfiles/file/nefigomotetiv.pdfIn PDF document text
    • https://movimientofamiliadejesus.com/images/uploaded/file/viziwizitelit.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/74452022405.pdfIn PDF document text
    • http://myagreement.com/UserFiles/file/20594187995.pdfIn PDF document text
    • https://imagebrandstudio.com/userfiles/file/55261751395.pdfIn PDF document text
    • http://www.jfac.kr/ckfinder/userfiles/files/rukobuwizap.pdfIn PDF document text
    • https://rosebankprimary.co.za/inc/ckfinder/userfiles/files/70393054677.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614559dd90bef---74134411773.pdfIn PDF document text
    • https://www.mftelhas.com.br/adm/Editor/ckfinder/userfiles/files/5461101387.pdfIn PDF document text
    • http://intimatehotelpattaya.com/image/upload/File/sijarav.pdfIn PDF document text
    • https://www.domaine-boussard-chablis.fr/ckfinder/userfiles/files/47288197520.pdfIn PDF document text
    • https://oykufestivali.com/ckfinder/userfiles/files/dolerotivotixizu.pdfIn PDF document text
    • http://lachina.cn/upload/file/nejibubab.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161318f14779ce---91800121850.pdfIn PDF document text
    • https://www.habitat-morvan.fr/ckfinder/userfiles/files/92156095938.pdfIn PDF document text
    • http://101balkon.ru/upload/files/863868686.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/powemazibowivukime.pdfIn PDF document text
    • https://globalcareerclub.com/FCKeditor/userfiles/file/pewukeruxo.pdfIn PDF document text
    • http://ssanadia.in/userfiles/file/81589331152.pdfIn PDF document text
    • http://oiseau-bleu-morzine.com/userfiles/file/bamotupu.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/xowukuxero.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_off0000e62b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE62B 17896 bytes
SHA-256: 867cc526410cb0bd95660937161dcc2fb64ac27b712865dd07d25c7cef2234d8
font_01_sfnt_off000113b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113B2 10304 bytes
SHA-256: a87fb5afd71cc4cb9fbaf8db81cb12bf9bd83120be4afa41190571fcdbc8bf44
font_02_sfnt_off00012b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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