Malicious PDF — malware analysis report

Static analysis result for SHA-256 30617162d5801d7a…

MALICIOUS

PDF

86.0 KB Created: 2021-07-16 06:37:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 1a90b160e983709cb148e3b1c2be4d51 SHA-1: 4fa33459fa367bc7c0e5dabd62f19de907123649 SHA-256: 30617162d5801d7a52f4d6e8704d9516d6d75b2baf746ea58ea44ca62a5ed52f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised or disposable hosting, suggesting a link farm designed to lure users to external sites. The presence of embedded JavaScript, combined with the PDF_JS heuristic, indicates that the document may attempt to execute malicious code. ClamAV detection and ML classification strongly support a malicious verdict, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://pistant.ru/uplcv?utm_term=international+relations+research+proposal+pdf PDF link annotation
    • http://animationcoach.com/userfiles/file/12071624006.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/tesutumuxerazujewigavirat.pdfIn PDF document text
    • https://ag-concept.ru/wp-content/plugins/super-forms/uploads/php/files/0f0836d2cac7dd7cc8a85db50945de41/19376272602.pdfIn PDF document text
    • http://hyundaiokla.com/uploads/files/fegefifiguvusesagurosawav.pdfIn PDF document text
    • http://romanakladatelstvi.cz/userfiles/file/96687994097.pdfIn PDF document text
    • http://hiroi-es.info/yamituki-n/uploads/files/fuzeridajuf.pdfIn PDF document text
    • http://inter-travel.hu/_user/file/58264973573.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/67978657609.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/78347675257.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/lisesaba.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/534d8acc4e1ffbe7dd71b4a9849fe164/35901192408.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/0kb85bbk4jf50f5l5qv4vn6og4/tesuvuvizekezawegina.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/jofupaxemanoresoxadizuroz.pdfIn PDF document text
    • http://oio.cn/uploadfiles/files/fitas.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/75138876532.pdfIn PDF document text
    • https://equator-maritime.com/userfiles/file/gafijirawabu.pdfIn PDF document text
    • http://architettosirocco.it/userfiles/files/rebewosilemibusavetixus.pdfIn PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/sipanorikoxuv.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ujt4treohjiqld4pbnc2j9ep0c/maladopajega.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160718b3a69441---16783529282.pdfIn PDF document text
    • http://orhs86reunion.com/clients/6/67/6744625166a0df26c7abb40948833271/File/60645252229.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/fd68fa7a797b56b1bdb02a0fa10522e6/sodiwoluw.pdfIn PDF document text
    • http://tokyosushilohaus.com/uploads/files/77612149700.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_off0000ebc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000103d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103D6 17140 bytes
SHA-256: 4bb33065c9056b00d06d8b42fc7d44bba1810fd1d296d803b354f9e540e23b55
font_02_sfnt_off0001307d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1307D 10668 bytes
SHA-256: 03789cb1a05d3a435b96301d9be3517d950efd4166f0f6d37ac29915dac93c31

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