Malicious PDF — malware analysis report

Static analysis result for SHA-256 7338cc032814ab4d…

MALICIOUS

PDF

154.8 KB Created: 2021-09-08 04:08:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3793ca9ad95219e42707b7a8340783cb SHA-1: 1315efa346b667bfc9841c215ae2d6b748bbb66a SHA-256: 7338cc032814ab4d03ed92bb04e8377fb68ea851d4a13beac5d90cd18fb104fb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The embedded JavaScript likely facilitates the redirection or further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 7

  • 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.
  • 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://pypconsultores.mx/userfiles/file/rajif.pdf In PDF document text
    • http://travelci.ru/ckfinder/userfiles/files/tegurogogadagajorurup.pdfIn PDF document text
    • http://www.pibmg.com.br/ckfinder/userfiles/files/files/40713783896.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/sorerijanafewesud.pdfIn PDF document text
    • http://katour.ru/admin/ckfinder/userfiles/files/92068508427.pdfIn PDF document text
    • https://keiba-like.biz/js/ckfinder/userfiles/files/kalorixijexikolivolud.pdfIn PDF document text
    • https://georeno.ca/userfiles/files/47711033192.pdfIn PDF document text
    • http://unternehmensberatung-hegenbarth.de/userfiles/file/25013773078.pdfIn PDF document text
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/4e7956d89f6cf9de9396c00c774b50da/3528401664.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/91088632764.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/vitefaxewugovus.pdfIn PDF document text
    • https://rinducm1.com/contents//files/54719670039.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/irirb34gr14csdb4464hbgtss0/vuwirizasuwomap.pdfIn PDF document text
    • https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/160fbf3bdedcaf---43272535246.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b955ccc9ec2---vedexiriwofuxo.pdfIn PDF document text
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/depiwu.pdfIn PDF document text
    • https://getracemirates.com/userfiles/files/53853780519.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/161217266ed220---98825346966.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/1607637c66e605---ripipuga.pdfIn PDF document text
    • http://andrewsexes.org/clients/867461/File/90988253148.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/pofovuxagofijiborik.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160e402b10c837---metiroro.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/a8no4rim3mpeai5o1a960tiil7/19142807121.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=inserire+file+pdf+su+wordPDF link annotation
    • 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_off0001fa56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA56 10368 bytes
SHA-256: ae23ca5cbec77c28c4ec6b025cd24b246309657cd12c517e52ff08d4223d1465
font_01_sfnt_off000211dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x211DD 19532 bytes
SHA-256: 40b1335592e0c65e9156497ca9e0b6bd42060bceaa8fb63e2969e84a38c7abcd
font_02_sfnt_off000244d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x244D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1