Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f06c4b012d8a1a…

MALICIOUS

PDF

75.5 KB Created: 2021-09-18 17:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f1bb5d860f63fe2e09764c5e9cf482af SHA-1: 2c7907f9aae7ff082c6b97d96f50eb31e5921bfc SHA-256: 14f06c4b012d8a1aae549e19eee39eaf3f741364ba56be355a6adf7829b0d1e5
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm for phishing or malware distribution. ClamAV detection and ML classification strongly indicate malicious intent. The embedded JavaScript is likely used to facilitate redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://archism.ru/uplcv?utm_term=questionnaire+for+marketing+strategy+project+pdf PDF link annotation
    • https://areopag.ru/sites/default/files/uploads/pafop.pdfIn PDF document text
    • http://www.teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/pilewixugazuxif.pdfIn PDF document text
    • https://yarpaket.ru/userfiles/file/zozurura.pdfIn PDF document text
    • http://mottaing.eu/userfiles/files/90251229632.pdfIn PDF document text
    • https://noddy.nu/images/file/woloxifogarosinaninu.pdfIn PDF document text
    • https://fasleh.net/Files/files/xosujofemeze.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/67695224725.pdfIn PDF document text
    • http://ilyxrace.com/userfiles/files/1039750034.pdfIn PDF document text
    • http://roocenter.ru/upload/file/jozofuburexanarurase.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/11939166191.pdfIn PDF document text
    • http://thebankcardservices.com/uploads/files/82554954996.pdfIn PDF document text
    • http://timandlor.com/userfiles/file/xunapokiz.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161401e289fae4---28382019387.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613be9c3a509c---jumepopuribalutev.pdfIn PDF document text
    • http://sportsbettingconsultants.net/cote_dor_import/admin/ckfinder/userfiles/files/81357735166.pdfIn PDF document text
    • http://aedelsur.com/contenido/files/gimuvapagubosiso.pdfIn PDF document text
    • https://www.histoiresdegroupes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d61167bb80---gikukapeduxapebuvinaposu.pdfIn PDF document text
    • http://lynhuagiasi.com/Images_upload/files/74699904942.pdfIn PDF document text
    • http://assotechne.eu/userfiles/files/pibewitetomusowelevedamub.pdfIn PDF document text
    • http://petgears.com/app/webroot/files/file/19811881858.pdfIn PDF document text
    • https://gastriklandsbf.se/UserFiles/files/kologojitewas.pdfIn PDF document text
    • http://www.gesas.it/media/mailinglist/file/miwewitoja.pdfIn PDF document text
    • https://www.vek-bg.com/app/templates/js/ckfinder/userfiles/files/64384276529.pdfIn PDF document text
    • http://www.taxivanclass.com/uploads/ckfinder/files/diwuxulibiwefitabumuz.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_off0000c410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC410 16012 bytes
SHA-256: 919d9d1a8aed7ed73e108f2493a46e2e1d33b77803a04f78ae1b8c1d30423fb0
font_01_sfnt_off0000ecb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECB8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000104cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104CF 11412 bytes
SHA-256: ac1930e4a2cfaa8e6a2fdb7bb8244842a6604eab4acef5c2fd783f07bd267397

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