Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de0204049c623cb…

MALICIOUS

PDF

81.1 KB Created: 2021-09-18 17:00:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 4a31841b691cd5b998d699676486db21 SHA-1: a1985145aa5bc1462a3fd8248a68eb3aa8cdfaf0 SHA-256: 0de0204049c623cb4330c08cc00f02f4dae5c924d804ca9bd27aae58be11d07a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to deliver second-stage payloads or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://philabc.ru/uplcv?utm_term=d%C3%A9verrouiller+android+empreinte+digitale PDF link annotation
    • https://kermanrooz.com/img/files/finepodewezexedusilanuta.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/161361e44c4372---kadirikagulewipasusado.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/38736925445.pdfIn PDF document text
    • http://digitalpolicycouncil.org/imagenes/file/bagugesosugu.pdfIn PDF document text
    • http://gazdalkodjokosan.hu/img/userfiles/file/54864118355.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412fe9216a9---3743464614.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/soralemope.pdfIn PDF document text
    • http://vibrobeton.by/pics/files/wawizogimuporog.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/40533642177.pdfIn PDF document text
    • http://weilandvloeren.nl/fckimages/pewinijixoduxavebilez.pdfIn PDF document text
    • http://stigstudiotecnico.it/userfiles/files/31404317211.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/1612fcd4d1faad---38051547434.pdfIn PDF document text
    • http://palazzodiaz.com/userfiles/files/85371822009.pdfIn PDF document text
    • http://bsbcarpet.com/userfiles/file/87464655285.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613504260bc6f---61739772184.pdfIn PDF document text
    • http://ssteelelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/wokelekojomudupajivogowi.pdfIn PDF document text
    • https://danielstrehlau.com/userfiles/file/8987164949.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/e0f00e0e7fa8ce661ef02b8e281584b4/4379475378.pdfIn PDF document text
    • http://cocoal.com/uploads/file/23547591396.pdfIn PDF document text
    • http://eyela.kr/uploadfile/fckeditor/file/fizeduteveximiwug.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/66769041136.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/denigajegegenaberiji.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_off0000d513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD513 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED2A 10888 bytes
SHA-256: 3d37e7ea05345126ce19ae113951197d147378fc00c00fd198fdb9967566eaba
font_02_sfnt_off000105c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C4 19052 bytes
SHA-256: e81ee118b4605a481443de317cfb39e0b5682f5c6c99d75af2e4b6db5613f834