Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e6d84615ced62c0…

MALICIOUS

PDF

82.6 KB Created: 2021-09-07 20:48:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 7a451b1baaad18997b15c0f0b05a071f SHA-1: bc10b702a46a33530f8d312116b6f7eefba25001 SHA-256: 2e6d84615ced62c095ef29ff5955fe0e4ba77cfba1d0ece1eec7da6dd1290ede
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://pixomot.ru/uplcv?utm_term=article+scientifique+d%C3%A9finition+pdf PDF link annotation
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/436a2eb342a9a4b3d5505993f5523631/kuzifafa.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/161054107956e8---10429264410.pdfIn PDF document text
    • https://kipass.fr/userfiles/file/wekuxoxatokumusopi.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160cc32a6ccd00---wojavowoku.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611352af71661---mikezukizorupiretewud.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/66775805801.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/lagej.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/kobuguxiteruzuzaze.pdfIn PDF document text
    • http://blackivy.pl/userfiles/file/tovijizekok.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/biliribeve.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160721ef10eb41---80522191248.pdfIn PDF document text
    • http://www.bufolari.com/public/immagini/file/gugumevevevofekopaduzi.pdfIn PDF document text
    • https://divanich96.ru/admin/ckfinder/userfiles/files/44614372697.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/17675639453.pdfIn PDF document text
    • http://www.moyekolodin.com/files/40192011438.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8782615b76---67429387087.pdfIn PDF document text
    • http://ugrctrani.it/userfiles/files/95673654238.pdfIn PDF document text
    • http://imhome-listings.com/userfiles/files/7734018929.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/c07d319ccf7f4442dce96de9dba947de/79465160954.pdfIn PDF document text
    • https://zlato-eu.cz/upload/files/nobebijirabelano.pdfIn PDF document text
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/1607081473fdf3---nebotezawu.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/ece715deaf0ad9b12871f5541ece52b6/28295084455.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607710c0e20dd---kuzaniwep.pdfIn PDF document text
    • http://www.pranabkumar.com/fckimages/file/76458842417.pdfIn PDF document text
    • http://www.iece.in/userfiles/file/37843818632.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_off0000d9f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9F6 10832 bytes
SHA-256: 2e7ca10c1886bd7b418cce3ac0f0c1314482e364e0f4ee5469b6bd67ebbf94e4
font_01_sfnt_off0000f28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF28D 18612 bytes
SHA-256: fc87f842570a0b04fd33caf3b2b7f53ad89fcfe24276c9348dc43da09f1b6403
font_02_sfnt_off00012202.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12202 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1