Malicious PDF — malware analysis report

Static analysis result for SHA-256 b65d3c965750b2ca…

MALICIOUS

PDF

94.8 KB Created: 2021-09-07 18:28:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c9e34d343e94b13fe3f7d3f6e4172c3f SHA-1: 7a74774fc2a995beb6d0fec7a26f84b19e6cc1d3 SHA-256: b65d3c965750b2cabfdeb5c8c03d7f092f179eaaf0472a645572e828b5176b3b
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and potentially disposable hosting domains. These links likely lead to phishing pages or further malware distribution, aligning with a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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=manual+car+revving+in+neutral PDF link annotation
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a85bbddc903---17176378899.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a48b05ebabb---xogukukipitozewurofali.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160928b2b3b844---58974068628.pdfIn PDF document text
    • https://bamfieldrental.com/userfiles/file/92899471671.pdfIn PDF document text
    • http://elskenecologie.nl/files/80549358593.pdfIn PDF document text
    • http://tpokebar.com/uploads/files/gefotogupiwuxorevaz.pdfIn PDF document text
    • https://ariaparvaz.com/basefile/ariaparvazcom/files/94751873857.pdfIn PDF document text
    • https://turbooto.vn/upload/files/89056967433.pdfIn PDF document text
    • http://netdepphunu.vn/images/userfiles/file/nupejivezata.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/93302095856.pdfIn PDF document text
    • http://pogologistics.com/ckfinder/userfiles/files/surewazirutatel.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b94824eddf9---90643540809.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/rofexawozesemanasisaxo.pdfIn PDF document text
    • http://jenan.com/ckfinder/userfiles/files/17636234719.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/36b72d7e9e43e8ad3706d104c3e57db3/tejibibavodiririk.pdfIn PDF document text
    • https://tranhtreo.com/images/ckeditor/files/1800660210.pdfIn PDF document text
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7f0bf1e62---5174495873.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606eedc81ead7---rekot.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1610bd26cd836a---mometinusebew.pdfIn PDF document text
    • http://iphysiology.ru/upload/lexexexatepu.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/31308599496.pdfIn PDF document text
    • https://bouveau-consulting.com/userfiles/file/maxep.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160787ec64952e---13205267837.pdfIn PDF document text
    • https://www.vedaaz.com/wp-content/plugins/super-forms/uploads/php/files/6f2c2242c9c824dfc60de7edd9bb4a62/17211613122.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_off00010d0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D0D 18900 bytes
SHA-256: be25c0cf89f60467bbf9bfcb3bbc7c4fad43a2757e82ad2c1818fa586b5bb51b
font_01_sfnt_off00013e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E7D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15694 10276 bytes
SHA-256: e5270ada6b3b5e201054432a7b70c127d04a70c25f888d71d87d00f864cf4236

Open this report in the interactive analyzer, or submit your own file for analysis.